The Anchor Coral (Euphyllia ancora) is a hard, stony coral found in tropical marine waters in coral reefs. It is similar to the Hammer Coral (Euphyllia fimbriata).
The Anchor Coral has blue-grey (and many other coloured) polyps, or tentacles, with puffy, tubular, sausage-shaped, or curved C-shaped tips.
It lives in colonies. Colonies grow to about 100 centimetres (39 inches) across.
The Anchor Coral feeds on plankton and food particles, and often shrimp.
The Anchor Coral is found in tropical waters in the Indian Ocean and West-Pacific Ocean. It is found in Australian waters, but the largest colonies are in the oceans of Indonesia.
It can reproduce both sexually and asexually. In the ocean, it reproduces sexually by releasing eggs and sperm at the same time. Each egg forms a tiny polyp which excretes calcium carbonate and develops into a coral.
However, many eggs are eaten by predators, such as fish.
Photographer: Martina Nicolls
Martina Nicolls: SIMILAR BUT DIFFERENT IN THE ANIMAL KINGDOM