The Blue-Green Chromis (Chromis viridis) is a small, tropical, marine (saltwater) ray-finned fish. It is a damselfish. It is also called the Blue Chromis or the Green Chromis.

The Blue-Green Chromis has pale-green to light-blue scales. Its dorsal fin (back fin) has an orange tint. It has a bright blue line from its eyes to the top of its mouth. It has bright blue lips. It has a forked tail.

Blue-Green Chromis

It grows to about 10 centimetres (4 inches).

It lives in schools of 6-100 individuals. It is native to Mediterranean waters and the Eastern Atlantic.

The Blue-Green Chromis eats plankton.

The Blue-Green Chromis male makes and guards the nest until the eggs hatch. The female lays the eggs.

Photographer: Martina Nicolls

Martina Nicolls: SIMILAR BUT DIFFERENT IN THE ANIMAL KINGDOM