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Saltwater Fish Species

Browse our saltwater fish species profiles, each with care requirements, tank size, diet and reef compatibility.

A common rule of thumb for how many marine fish you can keep in an aquarium is to allow 1 inch of fish per gallon of water; however, this can vary depending on the specific fish species and their size, with reef tanks generally requiring even more space per fish due to their larger waste output and need for swimming room.

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Swallowtail Angelfish

Swallowtail Angelfish

Genicanthus melanospilos

Overview Native to the Indo-Pacific, found in deep reef slopes and lagoons. Recognized for its elegant silver body, dark fin markings, and forked tail. Sexually dimorphic, with males having distinct black patterns on their dorsal and anal fins. One of the few...

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Lamarck’s Angelfish

Lamarck’s Angelfish

Genicanthus lamarck

Overview Native to the Indo-Pacific, commonly found in deep reef slopes and lagoons. Recognized for its elegant silver body with black horizontal stripes. A sexually dimorphic species, with females appearing more vibrant than males. Unlike many angelfish, it is...

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