
Crown squirrelfish
Sargocentron diadema
Holocentridae, Holocentrinae

Sargocentron diadema
Holocentridae, Holocentrinae
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Lives wild in American Samoa, Australia, China, Christmas Island, Cocos (Keeling) Islands, Comoros, Cook Islands, Egypt, and 40 more countries.
A common species that inhabits shallow coral reefs and lagoon and seaward reefs to depths of 30 m or more. Benthopelagic. Occurs under ledges or in crevices during the day and feeds on isopods; at night it roams over open sand and low-profile reef areas to feed on polychaetes and small crabs. Stomach contents listed gastropods (e.g. Atys sp.), polychaetes, small clams, solenogastrid, isopods, brachyuran crabs, and other crustaceans. Tends to occur in aggregations. Venomous spine on its preopercle. Size rarely exceeds 13 cm. Minimum depth reported taken from Ref. 30874.
Temperament, fin nippers, fish that eat other fish, and fish that need the same water. And what the Harmony mark in the app means.
From the store to the tank: how to get the fish used to your water, why you should add only a few at a time, and what to watch for in the first few days.
Why new fish should live in a tank of their own for a few weeks before they move in, what you need, and what to look for.
What is different in a saltwater aquarium: salt, refractometer, live rock and corals. An introduction for anyone thinking of giving it a try.