Damselfish

Pomacentridae

Feisty little reef residents, from the iconic clownfish sheltering in anemones to Mediterranean damselfish guarding their algae patches. Don't be surprised if a tiny one charges your mask — they're famously territorial.

Last updated April 2026

Mediterranean chromisChromis chromis8 photos

Least ConcernUp to 15 cm240mRocky reefPosidonia

A small, uniformly dark brown to black fish with a slightly forked tail. The most abundant fish on Mediterranean rocky reefs — impossible to miss.

Forms dense clouds above rocky reefs, feeding on plankton in mid-water — juveniles are electric blue and much easier to spot.

Mediterranean chromis

© Jouni Kuisma

Mediterranean chromis

© Jouni Kuisma

Mediterranean chromis

© Jouni Kuisma

Mediterranean chromis, Mediterranean moray eel

© Jouni Kuisma

Mediterranean chromis

© Jouni Kuisma

Mediterranean chromis

© Jouni Kuisma

Mediterranean chromis, Trumpet anemone

© Jouni Kuisma

Mediterranean chromis

© Jouni Kuisma

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