Common name: Cnidarians

Cnidaria is a diverse phylum of aquatic animals renowned for their distinctive radial symmetry and specialized cells known as cnidocytes, which contain stinging organelles called nematocysts. This phylum includes a wide array of species such as jellyfish, corals, sea anemones, and hydras. Cnidarians are primarily marine organisms, although some can be found in freshwater environments. They exhibit two main body forms: the sessile polyp and the free-swimming medusa, with some species capable of alternating between these forms during their life cycle.

One of the most fascinating aspects of Cnidaria is their role in reef ecosystems. Corals, which are colonial cnidarians, are the primary architects of coral reefs. They form symbiotic relationships with zooxanthellae, photosynthetic algae that live within their tissues. This symbiosis is crucial for the health of coral reefs, as the algae provide nutrients to the corals through photosynthesis, while the corals offer the algae a protected environment and access to sunlight.

For hobbyists, Cnidaria offers a variety of species that can be kept in home aquariums, ranging from the colorful and relatively easy-to-care-for soft corals to the more demanding stony corals. When keeping cnidarians, it is important to consider their lighting, water flow, and water quality needs, as these factors are critical to their survival and growth. Additionally, many cnidarians have potent stinging cells that can harm other tank inhabitants or even the aquarist, so careful handling and placement within the aquarium are necessary.

Overall, Cnidaria is a captivating phylum that not only plays a vital role in marine ecosystems but also offers intriguing and beautiful species for aquarium enthusiasts. Their unique biological features and ecological importance make them a subject of interest for both hobbyists and scientists alike.

1. 
   Common name: Starry Cup Coral

   Scientific name: Acanthastrea echinata
2. Common name: Acan Coral

   Scientific name: Acanthastrea hemprichii
3. Common name: Abrolhos Acropora

   Scientific name: Acropora abrolhosensis
4. Common name: Aculeus Staghorn Coral

   Scientific name: Acropora aculeus
5. Common name: Acropora azurea

   Scientific name: Acropora azurea
6. Common name: Acropora batunai

   Scientific name: Acropora batunai
7. Common name: Acropora bifurcata

   Scientific name: Acropora bifurcata
8. 
   Common name: Bushy Acropora

   Scientific name: Acropora bushyensis
9. 
   Common name: Staghorn Coral

   Scientific name: Acropora carduus
10. 
    Common name: Staghorn Coral

    Scientific name: Acropora caroliniana
11. Common name: Corymbose branching plate coral

    Scientific name: Acropora cerealis
12. Common name: Chesterfield Staghorn Coral

    Scientific name: Acropora chesterfieldensis
13. 
    Common name: Digitate Acropora

    Scientific name: Acropora digitifera
14. 
    Common name: Staghorn Coral

    Scientific name: Acropora divaricata
15. 
    Common name: Blueberry Sea Fan

    Scientific name: Acropora echinata
16. 
    Common name: Acropora elseyi

    Scientific name: Acropora elseyi
17. 
    Common name: Stout irregular branching coral

    Scientific name: Acropora florida
18. 
    Common name: Formosa Staghorn Coral

    Scientific name: Acropora formosa
19. Common name: Acropora forskali

    Scientific name: Acropora forskali
20. 
    Common name: Branching Acropora

    Scientific name: Acropora gemmifera
21. Common name: Staghorn Coral

    Scientific name: Acropora grandis
22. Common name: Granulosa Acropora

    Scientific name: Acropora granulosa
23. 
    Common name: Hemprich's Acropora

    Scientific name: Acropora hemprichii
24. Common name: Acropora horrida

    Scientific name: Acropora horrida
25. 
    Common name: Finger coral

    Scientific name: Acropora humilis
26. Common name: Acropora jacquelineae

    Scientific name: Acropora jacquelineae
27. Common name: Acropora kimbeensis

    Scientific name: Acropora kimbeensis
28. 
    Common name: Lamarck's Staghorn Coral

    Scientific name: Acropora lamarcki
29. 
    Common name: Acropora latistella

    Scientific name: Acropora latistella
30. Common name: bluetip coral

    Scientific name: Acropora loripes
31. Common name: Acropora lovelli

    Scientific name: Acropora lovelli
32. Common name: Acropora maryae

    Scientific name: Acropora maryae
33. 
    Common name: Acropora microphthalma

    Scientific name: Acropora microphthalma
34. 
    Common name: Fluro scale cushion coral

    Scientific name: Acropora millepora
35. 
    Common name: Montipora Capricornis

    Scientific name: Acropora monticulosa
36. Common name: Acropora multiacuta

    Scientific name: Acropora multiacuta
37. Common name: Acropora nana

    Scientific name: Acropora nana
38. 
    Common name: Acropora nasuta

    Scientific name: Acropora nasuta
39. 
    Common name: Acropora nobilis

    Scientific name: Acropora nobilis
40. 
    Common name: Column Staghorn Coral

    Scientific name: Acropora palifera
41. 
    Common name: elkhorn coral

    Scientific name: Acropora palmata
42. Common name: Acropora parilis

    Scientific name: Acropora parilis
43. 
    Common name: Pharaoh's Acropora

    Scientific name: Acropora pharaonis
44. Common name: fused staghorn

    Scientific name: Acropora prolifera
45. 
    Common name: Acropora pulchra

    Scientific name: Acropora pulchra
46. 
    Common name: Acropora robusta

    Scientific name: Acropora robusta
47. Common name: Acropora sarmentosa

    Scientific name: Acropora sarmentosa
48. Common name: Acropora schmitti

    Scientific name: Acropora schmitti
49. Common name: Acropora secale

    Scientific name: Acropora secale
50. Common name: Acropora selago

    Scientific name: Acropora selago
51. Common name: Acropora seriata

    Scientific name: Acropora seriata
52. 
    Common name: Staghorn Coral

    Scientific name: Acropora spicifera
53. 
    Common name: Acropora squarrosa

    Scientific name: Acropora squarrosa
54. 
    Common name: Acropora subulata

    Scientific name: Acropora subulata
55. Common name: Acropora suharsonoi

    Scientific name: Acropora suharsonoi
56. 
    Common name: purple tipped acropora

    Scientific name: Acropora tenuis
57. Common name: Blue Tort Acropora

    Scientific name: Acropora tortuosa
58. Common name: Acropora tumida

    Scientific name: Acropora tumida
59. Common name: Acropora valenciennesi

    Scientific name: Acropora valenciennesi
60. 
    Common name: Acropora valida

    Scientific name: Acropora valida
61. Common name: Acropora variolosa

    Scientific name: Acropora variolosa
62. Common name: Acrozoanthus Australiae

    Scientific name: Acrozoanthus australiae
63. 
    Common name: Beadlet Anemone

    Scientific name: Actinia equina
64. 
    Common name: Strawberry Anemone

    Scientific name: Actinia fragacea
65. 
    Common name: Waratah anemone

    Scientific name: Actinia tenebrosa
66. Common name: tree anemone

    Scientific name: Actinodendron arboreum
67. 
    Common name: Branching anemone

    Scientific name: Actinodendron glomeratum
68. Common name: Branching anemone

    Scientific name: Actinodendron plumosum
69. 
    Common name: Haeckel's Anemone

    Scientific name: Actinostephanus haeckeli
70. 
    Common name: sheet coral

    Scientific name: Agaricia lamarcki
71. 
    Common name: Trumpet anemone

    Scientific name: Aiptasia mutabilis
72. 
    Common name: pale anemone

    Scientific name: Aiptasia pallida
73. 
    Common name: dead man's fingers

    Scientific name: Alcyonium digitatum
74. 
    Common name: Red sea fingers

    Scientific name: Alcyonium glomeratum
75. 
    Common name: Dead Man's Fingers

    Scientific name: Alcyonium palmatum
76. 
    Common name: Net coral

    Scientific name: Alveopora catalai
77. 
    Common name: Alveopora Coral

    Scientific name: Alveopora gigas
78. 
    Common name: Giant Cup Mushroom Coral

    Scientific name: Amplexidiscus fenestrafer
79. 
    Common name: False flower coral

    Scientific name: Anacropora forbesi
80. Common name: Manjano Anemone

    Scientific name: Anemonia manjano
81. 
    Common name: Snakelocks anemone

    Scientific name: Anemonia viridis
82. 
    Common name: Anomastraea irregularis

    Scientific name: Anomastraea irregularis
83. 
    Common name: Waving Hand Coral

    Scientific name: Anthelia glauca
84. 
    Common name: giant green anemone

    Scientific name: Anthopleura xanthogrammica
85. Common name: slimy sea plume

    Scientific name: Antillogorgia americana
86. 
    Common name: forked sea feather

    Scientific name: Antillogorgia bipinnata
87. Common name: Sea Plume

    Scientific name: Antillogorgia elisabethae
88. Common name: Galapagos black coral

    Scientific name: Antipathes galapagensis
89. 
    Common name: Starflower coral

    Scientific name: Astreopora listeri
90. 
    Common name: Moon Jellyfish

    Scientific name: Aurelia aurita
91. 
    Common name: Branching Frogspawn Coral

    Scientific name: Australogyra zelli
92. 
    Common name: corkscrew anemone

    Scientific name: Bartholomea annulata
93. Common name: Curlycue Anemone

    Scientific name: Bartholomea lucida
94. 
    Common name: Branched cup coral

    Scientific name: Blastomussa merleti
95. 
    Common name: Branched cup coral

    Scientific name: Blastomussa wellsi
96. 
    Common name: Bulb Anemone

    Scientific name: Boloceroides mcmurrichi
97. Common name: corky sea fingers

    Scientific name: Briareum asbestinum
98. 
    Common name: Hermit crab anemone

    Scientific name: Calliactis polypus
99. Common name: Cantharellus jebbi

    Scientific name: Cantharellus jebbi
100. 
     Common name: Kenya Tree Coral

     Scientific name: Capnella imbricata
101. 
     Common name: carnation coral

     Scientific name: Caryophyllia inornata
102. 
     Common name: Devonshire cup-coral

     Scientific name: Caryophyllia smithii
103. 
     Common name: Upside-down Jellyfish

     Scientific name: Cassiopea andromeda
104. 
     Common name: Mangrove Upside-down Jellyfish

     Scientific name: Cassiopea xamachana
105. 
     Common name: Elegance coral

     Scientific name: Catalaphyllia jardinei
106. 
     Common name: Candy Cane Coral

     Scientific name: Caulastraea connata
107. 
     Common name: Finger coral

     Scientific name: Caulastraea echinulata
108. 
     Common name: Finger coral

     Scientific name: Caulastraea furcata
109. 
     Common name: Finger coral

     Scientific name: Caulastraea tumida
110. 
     Common name: Finger coral

     Scientific name: Caulastrea curvata
111. 
     Common name: Cavernularia obesa

     Scientific name: Cavernularia obesa
112. Common name: southern cerianthid

     Scientific name: Ceriantheopsis americana
113. 
     Common name: Large tube anemone

     Scientific name: Cerianthus filiformis
114. 
     Common name: Cylinder Anemone

     Scientific name: Cerianthus lloydii
115. 
     Common name: Tube Anemone

     Scientific name: Cerianthus membranaceus
116. 
     Common name: whip Coral

     Scientific name: Cirrhipathes anguina
117. Common name: Colt Coral

     Scientific name: Cladiella australis
118. 
     Common name: Cauliflower Coral

     Scientific name: Cladiella pauciflora
119. 
     Common name: tube coral

     Scientific name: Cladocora arbuscula
120. 
     Common name: Green Star Polyps

     Scientific name: Clavularia viridis