Tag: Corals, Jellyfish & Sea Anemones (Cnidaria)

Containing around 9,000 species, Cnidaria is a large and extremely diverse phylum of marine animals, all of which share the presence of "cnidocytes" (specialised cells used for capturing prey) as their distinguishing feature. Cnidarians can generally be placed within one of the following four classes: Hydrozoa - eg. Hydra, "Fire Corals", colonial hydroids such as the Portuguese Man o' War Scyphozoa - "true jellyfish" Cubozoa - Box Jellyfish Anthozoa - Sea Anemones, Corals and Sea Pens

Alan's picture
Magnificent Anemone (Heteractis Magnifica) with Pink Anemonefish (Amphiprion Perideraion)

A Pink Anemonefish (Amphiprion Perideraion) settles into its host Magnificent Anemone (Heteractis Magnifica) as the early evening sunlight begins to fade over Mae Haad/Koh Ma reef.

Alan's picture
Hairy Mushroom Anemone (Rhodactis Indosinensis)

Evidence of the nasty sting that can be inflicted by members of the Cnidaria family which includes Jellyfish, Corals and Sea Anemones.

Alan's picture
Hairy Mushroom Anemone (Rhodactis Indosinensis)

In this photograph of the species i've tentatively identified as the Hairy Mushroom Anemone (Rhodactis Indosinensis), the pedal disk or foot can be seen attached to a red encrusting sponge, possibly Clathria Mima or Monanchora Barbadensis.

Alan's picture
Elephant's Ear Anemone (Amplexidiscus Fenestrafer)

This photograph, taken at Sail Rock, shows the underside of an Elephant's Ear Anemone (Amplexidiscus Fenestrafer) and its method of attaching itself to a suitable surface by means of a powerful pedal disk or "foot" as it is more commonly known.

Alan's picture
Elephant's Ear Anemone (Amplexidiscus Fenestrafer)

This photo shows the characteristic parallel ridges which form a margin around the flat, tentacle-covered disc of the Elephant's Ear Anemone (Amplexidiscus Fenestrafer).

Alan's picture
A Colony of Magnificent Anemones (Heteractis Magnifica) at South-West Pinnacles, Koh Tao

One of the most striking features at South West Pinnacles are the beautiful colonies of

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Magnificent Anemone (Heteractis Magnifica)

A close-up view of a Magnificent Anemone (Heteractis Magnifica), photographed at Sail Rock.

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Pink Anemonefish (Amphiprion Perideraion) guarding its eggs

A Pink Anemonefish (Amphiprion Perideraion) attentively guarding its clutch of eggs which are attached to the rock.
Usually the eggs would be hidden beneath the protective tentacles of the Magnificent Anemones (Heteractis Magnifica), but on this occasion a strong current meant that the eggs were exposed.

Alan's picture
Pink Anemonefish (Amphiprion Perideraion)

A Pink Anemonefish (Amphiprion Perideraion) makes a rare excursion away from its host Magnificent Anemone (Heteractis Magnifica) to inspect the camera lens.

Alan's picture
Pink Anemonefish (Amphiprion Perideraion)

A Pink Anemonefish (Amphiprion Perideraion) hiding within the stinging tentacles of its host Magnificent Anemone (Heteractis Magnifica) at Sail Rock.