Invertebrates

870 species

Invertebrates are a diverse and fascinating group of organisms that can add both functionality and aesthetic appeal to a saltwater aquarium. They include species like anemones, cephalopods, crabs, cucumbers, fan worms, lobsters, sea slugs, shrimps, snails, sponges, starfish, tridacna clams, and urchins. Each of these subcategories brings its own unique characteristics and requirements, making them interesting and sometimes challenging additions to a marine tank.

Anemones, for instance, are known for their symbiotic relationships with clownfish. They require stable water conditions and strong lighting to thrive. Cephalopods, such as octopuses and cuttlefish, are highly intelligent and fascinating but require specialized care due to their sensitivity to water quality and their escape artist tendencies. Crabs and shrimps are excellent scavengers, helping to keep the tank clean by eating detritus and algae. However, some species can be aggressive and may not be suitable for all tank mates.

Sea cucumbers and fan worms are filter feeders, playing a crucial role in maintaining water quality by filtering out particulate matter. Lobsters and sea slugs, while intriguing, can be more challenging to keep due to their specific dietary needs and behaviors. Tridacna clams and urchins are popular for their striking appearances but require stable water parameters and sufficient calcium levels for shell and spine growth. Starfish and snails are generally hardy and can help control algae growth, but some species have specific dietary needs that must be met.

Overall, invertebrates offer a wide range of benefits and challenges, making them a captivating addition to any saltwater aquarium. Their unique behaviors and roles within the ecosystem can provide endless fascination for hobbyists, but it's essential to research each species' specific requirements to ensure their health and well-being.

  1. Common name: Red Ball Sponge
    Scientific name: Aaptos suberitoides
  2. Algae Octopus (Abdopus aculeatus) camouflages perfectly with its surrounding on coral reef
    Common name: Algae Octopus
    Scientific name: Abdopus aculeatus
  3. Crown of Thorns Starfish (Purple Variant)
    Common name: Crown-of-Thorns Starfish
    Scientific name: Acanthaster planci
  4. Common name: Cactus Sponge
    Scientific name: Acanthella acuta
  5. Common name: Cave Sponge
    Scientific name: Acanthella cavernosa
  6. Common name: Klethra Sponge
    Scientific name: Acanthella klethra
  7. Acanthopleura sp., tropical species of chiton, a marine molluscs on a rock
    Common name: Vaillant's Chiton
    Scientific name: Acanthopleura vaillantii
  8. Needle Cuttlefish (Acanthosepion aculeatum)
    Common name: Needle Cuttlefish
    Scientific name: Acanthosepion aculeatum
  9. Pharaoh Cuttlefish swimming in the blue
    Common name: Pharaoh Cuttlefish
    Scientific name: Acanthosepion pharaonis
  10. Orangutan Crab (Achaeus Japonicus) on coral, Lembeh Strait, Indonesia
    Common name: Orangutan Crab
    Scientific name: Achaeus japonicus
  11. Beadlet Anemone (Actinia equina), Eastern Scheldt, The Netherlands
    Common name: Beadlet Anemone
    Scientific name: Actinia equina
  12. Strawberry Anemone (Actinia fragacea), Plobannalec-Lesconil, France
    Common name: Strawberry Anemone
    Scientific name: Actinia fragacea
  13. Waratah Anemones underwater
    Common name: Waratah anemone
    Scientific name: Actinia tenebrosa
  14. Common name: tree anemone
    Scientific name: Actinodendron arboreum
  15. Blue-ring octopus on red branching coral
    Common name: Branching anemone
    Scientific name: Actinodendron glomeratum
  16. Common name: Branching anemone
    Scientific name: Actinodendron plumosum
  17. Common name: Bannwarth's Sea Cucumber
    Scientific name: Actinopyga bannwarthi
  18. Prickly sea cucumber, Fury Shoal, Red Sea, Egypt
    Common name: Spiny Sea Cucumber
    Scientific name: Actinopyga crassa
  19. Actinopyga Mauritiana - Sea Cucumber
    Common name: Brownfish
    Scientific name: Actinopyga echinites
  20. Red holothurian underwater
    Common name: stone fish (holothurian)
    Scientific name: Actinopyga lecanora
  21. Actinopyga Mauritiana - Sea Cucumber
    Common name: Surf redfish
    Scientific name: Actinopyga mauritiana
  22. Common name: Plump sea cucumber
    Scientific name: Actinopyga obesa
  23. Branching Hammer Coral ( reef coral).
It is common in the Pacific Ocean, reaching as far north as Japan.
    Common name: Branching Hammer Coral
    Scientific name: Adreus fascicularis
  24. A banana nudibranch (Aegires minor) is slowly crawling across the seabed, Raja Ampat, Indonesia, Asia
    Common name: A nudibranch
    Scientific name: Aegires minor
  25. Gray Norse God Nudibranch, Aegires serenae
    Common name: Green and black gill guard slug
    Scientific name: Aegires serenae
  26. Caribbean coral reef
    Common name: orange elephant ear sponge
    Scientific name: Agelas clathrodes
  27. Agelas conifera, brown tube sponge
    Common name: Brown Tube Sponge
    Scientific name: Agelas conifera
  28. Common name: Rough Tube Sponge
    Scientific name: Agelas dispar
  29. Common name: Fan Sponge
    Scientific name: Agelas flabelliformis
  30. Branching sponge weed and seaweed
    Common name: Slimy Branching Sponge
    Scientific name: Agelas gracilis
  31. Common name: Mauritian Sponge
    Scientific name: Agelas mauritiana
  32. Oranger Demosponge (Agelas oroides), Corfu, Greece, Europe
    Common name: Gold Sponge
    Scientific name: Agelas oroides
  33. Orange Elephant Ear Sponge (Agelas Clathrodes)
    Common name: Elephant Ear Sponge
    Scientific name: Agelas schmidtii
  34. Aiolochroia crassa,Benching tube sponge
    Common name: Branching tube sponge
    Scientific name: Aiolochroia crassa
  35. Small glass anemone pest in reef aquarium tank - Exaiptasia or Aiptasia Pallida
    Common name: Trumpet anemone
    Scientific name: Aiptasia mutabilis
  36. Small glass anemone pest in reef aquarium tank - Exaiptasia or Aiptasia Pallida
    Common name: pale anemone
    Scientific name: Aiptasia pallida
  37. Common name: Aldisa barlettai
    Scientific name: Aldisa barlettai
  38. King Ragworm (Alitta virens) close-up lying on the sand
    Common name: King Ragworm
    Scientific name: Alitta virens
  39. Elegant Crinoid Squat Lobster (Allogalathea elegans)
    Common name: Elegant Crinoid Squat Lobster
    Scientific name: Allogalathea elegans
  40. Red snapping shrimp (Alpheus armatus) hiding in a corkscrew anemone in the Caribbean, Roatan, Bay Islands, Honduras
    Common name: brown snapping shrimp
    Scientific name: Alpheus armatus
  41. Common name: Beautiful goby shrimp
    Scientific name: Alpheus bellulus
  42. Red snapping shrimp (Alpheus armatus) hiding in a corkscrew anemone in the Caribbean, Roatan, Bay Islands, Honduras
    Common name: red snapping shrimp
    Scientific name: Alpheus bisincisus
  43. Gold-streaked prawn-goby and  Djeddah snapping shrimp
    Common name: Djeddah snapping shrimp
    Scientific name: Alpheus djeddensis
  44. Common name: Immaculate Pistol Shrimp
    Scientific name: Alpheus immaculatus
  45. Common name: fine-striped snapping shrimp
    Scientific name: Alpheus ochrostriatus
  46. Common name: Pacific Pistol Shrimp
    Scientific name: Alpheus pacificus
  47. Flagtail Shrimpgoby (Amblyeleotris yanoi) live together with Randall's Pistol Shrimp (Alpheus randalli), Tulamben, Bali, Indonesia
    Common name: Randall's Pistol Shrimp
    Scientific name: Alpheus randalli
  48. Common name: Red-spotted Pistol Shrimp
    Scientific name: Alpheus rubromaculatus
  49. Common name: Twin Snapping Shrimp
    Scientific name: Alpheus soror
  50. Common name: carrot-sponge
    Scientific name: Amphilectus fucorum
  51. Erect rope sponge and Cushion starfish underwater
    Common name: erect rope sponge
    Scientific name: Amphimedon compressa
  52. Coconut Octopus (Amphioctopus marginatus) making its house from a shell in the night. Macro underwater world of Tulamben, Bali, Indonesia
    Common name: Coconut Octopus
    Scientific name: Amphioctopus marginatus
  53. The amazing and mysterious underwater world of Indonesia, North Sulawesi, Manado, brittlestar
    Common name: brittlestar
    Scientific name: Amphiura filiformis
  54. Holthuis Cleaner Shrimp, Ancylomenes holthuisi at a Puerto Galera tropical coral reef in the Philippines. This transparent shrimp is hiding among the tentacles of a beautiful sea anemone
    Common name: Holthuis' Shrimp
    Scientific name: Ancylomenes holthuisi
  55. Sarasvati Anemone Shrimp Ancylomenes sarasvati
    Common name: Sarasvati Anemone Shrimp
    Scientific name: Ancylomenes sarasvati
  56. Common name: Manjano Anemone
    Scientific name: Anemonia manjano
  57. Mediterranean Sea Anemone (Snakelocks Anemone, Anemonia Viridis), Kornati Archipelago, Adriatic Sea, Croatia
    Common name: Snakelocks anemone
    Scientific name: Anemonia viridis
  58. Mediterranean feather star water lilly - Antedon mediterranea on sea bed
    Common name: Feather star
    Scientific name: Antedon mediterranea
  59. Anemone Mandala 03
    Common name: giant green anemone
    Scientific name: Anthopleura xanthogrammica
  60. Common name: Aperiovula juanjosensii
    Scientific name: Aperiovula juanjosensii
  61. Common name: Crater Sea Squirt
    Scientific name: Aplidium crateriferum
  62. Common name: Tabasco Tunicate
    Scientific name: Aplidium tabascum
  63. California Sea Hare (Aplysia californica)
    Common name: California Sea Hare
    Scientific name: Aplysia californica
  64. Common name: Brown Sea Hare
    Scientific name: Aplysia depilans
  65. Aplysia fasciata
    Common name: mottled sea hare
    Scientific name: Aplysia fasciata
  66. Dotted sea-hare (Aplysia punctata) in Mediterranean Sea
    Common name: spotted sea hare
    Scientific name: Aplysia punctata
  67. Yellow tube sea sponge - Aplysina aerophoba, underwater image into the Mediterranean sea
    Common name: Yellow tube sponge
    Scientific name: Aplysina aerophoba
  68. Caribbean coral garden
    Common name: Stove Pipe Sponge
    Scientific name: Aplysina archeri
  69. Coral reef Row Pore Rope Sponge (Aplysina cauliformis)
    Common name: row pore rope sponge
    Scientific name: Aplysina cauliformis
  70. Yellow-cave sponge (Aplysina cavernicola) in Mediterranean Sea
    Common name: Vase Sponge
    Scientific name: Aplysina cavernicola
  71. Yellow tube sea sponge - Aplysina aerophoba, underwater image into the Mediterranean sea
    Common name: Yellow tube sponge
    Scientific name: Aplysina fistularis
  72. Underwater coral reef
    Common name: Stove Pipe Sponge
    Scientific name: Aplysina lacunosa
  73. A Pickle of Sea Cucumbers
    Common name: California Sea Cucumber
    Scientific name: Apostichopus californicus
  74. Tropical sea cucumber (Pearsothuria graeffei)
    Common name: Warty sea cucumber
    Scientific name: Apostichopus parvimensis
  75. Common name: Burton's Starfish
    Scientific name: Aquilonastra burtoni
  76. Sand Sifting Sea Star - (Astropecten polycanthus)
    Common name: Sand Sifting Starfish
    Scientific name: Archaster angulatus
  77. sand sifting starfish (archaster typicus) moving through the glass of a reef aquarium
    Common name: Indo-Pacific Beach Star
    Scientific name: Archaster typicus
  78. Portrait of a regal slipper lobster (Arctides regalis) also called shovel-nosed lobster; Hawaii, United States of America
    Common name: Regal Slipper lobster
    Scientific name: Arctides regalis
  79. Ardeadoris Nudibranch
    Common name: Ardeadoris egretta
    Scientific name: Ardeadoris egretta
  80. Arthuria canariensis
    Common name: Yellow Calcareous Sponge
    Scientific name: Arthuria canariensis
  81. Dwarf Cuttlefish (Ascarosepion bandense) at Lembeh strait, Indonesia
    Common name: Dwarf Cuttlefish
    Scientific name: Ascarosepion bandense
  82. Cuttlefish (Ascarosepion latimanus), Flores Indonesia
    Common name: Broadclub Cuttlefish
    Scientific name: Ascarosepion latimanus
  83. Juvenile Papuan Cuttlefish hunting on coral reef (Ascarosepion papuense)
    Common name: Papuan Cuttlefish
    Scientific name: Ascarosepion papuense
  84. Flamboyant Cuttlefish (Ascarosepion pfefferi) with flamboyant colors
    Common name: Flamboyant Cuttlefish
    Scientific name: Ascarosepion pfefferi
  85. Dirty Sea-squirt or European Sea Squirt (Ascidiella aspersa), Norwegian Sea, Northern Atlantic, Norway, Europe
    Common name: dirty sea-squirt
    Scientific name: Ascidiella aspersa
  86. Northern Pacific Seastar (Asterias amurensis) in Japan
    Common name: Northern Pacific Seastar
    Scientific name: Asterias amurensis
  87. étoile de mer commune (Asterias rubens).
    Common name: Northern Sea Star
    Scientific name: Asterias rubens
  88. Orange starfish on the sea-bed
    Common name: Asterina Starfish
    Scientific name: Asterina anomala
  89. Clumpy Nudibranch,Asteronotus cespitosus, Kona Hawaii.
    Common name: Nudibranch
    Scientific name: Asteronotus cespitosus
  90. Common name: sheriff-badge sea star
    Scientific name: Asteropsis carinifera
  91. Magnificent fire urchin (Asthenosoma ijimai) near Anilao, Batangas, Luzon, Philippines.  Underwater photography and travel.
    Common name: Fire Urchin
    Scientific name: Asthenosoma ijimai
  92. Coleman Shrimp, Periclimenes colemani, Sea Urchin, Variable Fire Urchin, Asthenosoma varium, Coral Reef, Lembeh, North Sulawesi, Indonesia, Asia
    Common name: variable fire urchin
    Scientific name: Asthenosoma varium
  93. Common name: Anderson's Sand Star
    Scientific name: Astropecten andersoni
  94. Red Comb Starfish (Astropecten aranciacus)
    Common name: Red Comb Starfish
    Scientific name: Astropecten aranciacus
  95. Giovane esemplare di stella marina, Astropecten bispinosus, tra la sabbia
    Common name: Bispinosus Sand Star
    Scientific name: Astropecten bispinosus
  96. Sand Sifting Sea Star - (Astropecten polycanthus)
    Common name: Sand Sifting Starfish
    Scientific name: Astropecten jonstoni
  97. Astropecten spiny sea star on silty bottom
    Common name: comb star
    Scientific name: Astropecten polyacanthus
  98. Mediterranean Sea Sand Starfish (Astropecten spinulosus)
    Common name: Sea Sand Starfish
    Scientific name: Astropecten spinulosus
  99. Basket Star Astrophyton muricatum in Tayrona National Natural Park
    Common name: Giant Basket Star
    Scientific name: Astrophyton muricatum
  100. Magnificent Urchin Astropyga magnifica
    Common name: Pale spine fire urchin
    Scientific name: Astropyga magnifica
  101. Blue-spotted Urchin (Astropyga radiata)
    Common name: Blue-spotted Urchin
    Scientific name: Astropyga radiata
  102. Common name: Living Fossil Sponge
    Scientific name: Astrosclera willeyana
  103. Common name: flag pen shell
    Scientific name: Atrina vexillum
  104. Colony of tunicates (Atriolum robustum), Maldives
    Common name: Robust sea squirt
    Scientific name: Atriolum robustum
  105. Moon Jellyfish (Aurelia aurita) in an aquarium
    Common name: Moon Jellyfish
    Scientific name: Aurelia aurita
  106. Brown sea cucumber (Holothuria stellati) on sea bottom, Aegean Sea, Greece, Halkidiki
    Common name: New zealand sea cucumber
    Scientific name: Australostichopus mollis
  107. Common name: Aru Sponge
    Scientific name: Axinella aruensis
  108. Sponge, axinella cannabina, Kas Turkey
    Common name: Axinella cannabina
    Scientific name: Axinella cannabina
  109. axinelle plate
    Common name: yellow sponge
    Scientific name: Axinella damicornis
  110. Callyspongia aculeata, commonly known as the branching vase sponge
    Common name: branching sponge
    Scientific name: Axinella dissimilis
  111. Common name: Yellow Sponge
    Scientific name: Axinella flustra
  112. Axinella polypoides 847_190 R, Esponja amarilla, esponja.
    Common name: Axinella Polypoides
    Scientific name: Axinella polypoides
  113. Common name: Rough Sponge
    Scientific name: Axinella verrucosa
  114. Common name: Axinyssa ambrosia
    Scientific name: Axinyssa ambrosia
  115. Pederson Cleaner Shrimp (Periclimenes pedersoni) in Corkscrew Anomones (Bartholomea annulata)
    Common name: corkscrew anemone
    Scientific name: Bartholomea annulata
  116. Common name: Curlycue Anemone
    Scientific name: Bartholomea lucida
  117. Close-up of a beautiful mediterranean nudibranch or anemone seaslug (Berghia coerulescens)
    Common name: Berghia Nudibranch
    Scientific name: Berghia stephanieae
  118. a colorful nudibranch crawling on the coral. Science name: 
Berthella martensi (Pilsbry, 1896).  Ie Island, Okinawa, Japan
    Common name: Marten's Berthella
    Scientific name: Berthella martensi
  119. social feather duster, Bispira brunnea
    Common name: Social feather duster
    Scientific name: Bispira brunnea
  120. Closup on twin fan worm or spiral fan worm Bispira volutacornis
    Common name: Banded Fanworm
    Scientific name: Bispira melanostigma