Sea Perch

The swallowtail sea perch, (Anthias anthias), is a small fish that resides in densely populated groups, typically on rocky seabeds. Its body displays a reddish-pink hue, with fins alternating between purple and yellow. The head is characterised by three distinct yellow lines. These fish favour the tranquillity of caves, shipwrecks, and areas with subdued lighting on protruding rock surfaces. They are seldom found at depths less than 30 metres. Despite not being avid swimmers, they are distinguished by their unique grace. Despite their seemingly small mouths, they can open wide to ingest a diet comprising zooplankton, crustaceans, and small fish.

Among sea perch, males typically assume a dominant role. Normally, only one male is present in each group, as the strongest one eliminates any rivals. In the event of the male's disappearance, one of the females assumes its role. These fish exhibit primitive hermaphroditism, meaning they transform from females into males. However, this transformation is not arbitrary: a female will only undergo this change if the dominant male is no longer present. To identify the male in this group, look for the largest fish with the most vibrant colours and the largest fins.

Photos: By Theano Dandari

The sea perch can be observed in the tanks at the Aquarium of Crete.