Common name: Saddle anemone

Scientific name: Stichodactyla haddoni (Saville-Kent, 1893)

General information

Haddon's Carpet Anemone, Stichodactyla haddoni, is a large and colorful species of sea anemone that is popular among reef aquarium enthusiasts. This anemone is known for its striking appearance, with a flat, spread-out oral disc that can exhibit a variety of colors, including shades of green, blue, brown, and purple. The tentacles are typically short and stubby, and the anemone can reach a significant size, making it a centerpiece in many reef tanks.

Details

Recommended minimum tank volume
200 liter (53 gallons)
Salinity
S.G. 1.023 to 1.025
Temperature
24 to 28 °C (75 to 82 °F)
Acidity
pH 8.1 to 8.4
Average size
50 cm (1′8″)
Care level
Moderate to easy Needs stable conditions & good lighting
Diet
Carnivore Feeds on fish, shrimp, and mussels
Reefsafe
Yes
Aggression
Semi aggresive Can be territorial with space
Captive bred
No

Taxonomy

  1. Kingdom
    Animals
    Animalia
  2. Phylum
    Cnidarians
    Cnidaria
  3. Class
    Anthozoans
    Anthozoa
  4. Order
    Sea Anemones
    Actiniaria
  5. Family
    Carpet Anemones
    Stichodactylidae
  6. Genus
    Carpet Anemones
    Stichodactyla
  7. Species
    Saddle anemone
    Stichodactyla haddoni (Saville-Kent, 1893)
  8. Synonyms
    Actinia gigantea Ehrenb.
    Actinia gigantea Forskal
    Discosoma giganteum Forsk.
    Discosoma haddoni Saville-Kent, 1893
    Stoichactis ambonensis (Kwietn.)
    Stoichactis haddoni Saville Kent

Care

Caring for Haddon's Carpet Anemone requires a well-established aquarium with stable water parameters. They need a sandy substrate to anchor their foot and ample space to expand without touching other corals or anemones, as they can be aggressive towards neighbors. Strong lighting and moderate to strong water flow mimic their natural reef environment, promoting health and growth. Feeding should consist of meaty foods like fish, shrimp, and other seafood.

Reproduction

In the wild, Stichodactyla haddoni reproduces both sexually and asexually. In aquariums, they can occasionally reproduce asexually through pedal laceration, where pieces of the foot develop into new individuals. Sexual reproduction is rare in captivity.

Symbiosis

Haddon's Carpet Anemone is well-known for its symbiotic relationship with clownfish, particularly the @species:amphiprion-clarkii and @species:amphiprion-ocellaris, which can live within the anemone's tentacles for protection. The anemone benefits from the clownfish's waste as a nutrient source and the clownfish is protected from predators.

Habitat

Stichodactyla haddoni is found in the Indo-Pacific region, from the Red Sea to Fiji, and from Japan to Australia. They typically inhabit shallow waters on sandy bottoms or reef flats where they can receive plenty of sunlight.