''Sargocentron diadema'', known commonly as the crowned squirrelfish, is a species of marine
ray-finned fish
Actinopterygii (; ), members of which are known as ray-finned fish or actinopterygians, is a class of bony fish that comprise over 50% of living vertebrate species. They are so called because of their lightly built fins made of webbings of sk ...
belonging to the
family
Family (from ) is a Social group, group of people related either by consanguinity (by recognized birth) or Affinity (law), affinity (by marriage or other relationship). It forms the basis for social order. Ideally, families offer predictabili ...
Holocentridae
Holocentridae is a family of ray-finned fish, the only family of the suborder Holocentroidei and the only family of the order Holocentriformes. The members of the subfamily Holocentrinae are typically known as squirrelfish, while the members of ...
, which is the only family in the
order
Order, ORDER or Orders may refer to:
* A socio-political or established or existing order, e.g. World order, Ancien Regime, Pax Britannica
* Categorization, the process in which ideas and objects are recognized, differentiated, and understood
...
Holocentriformes
Holocentridae is a family of ray-finned fish, the only family of the suborder Holocentroidei and the only family of the order Holocentriformes. The members of the subfamily Holocentrinae are typically known as squirrelfish, while the members of ...
. Squirrelfish in general are large, active, nocturnal fish which are usually red in color.
[Bailey, M. and G. Sandford. ''The Ultimate Encyclopedia of Aquarium Fish & Fish Care''. p. 246.]
Distribution
The crowned squirrelfish is commonly found on the
reef
A reef is a ridge or shoal of rock, coral, or similar relatively stable material lying beneath the surface of a natural body of water. Many reefs result from natural, abiotic component, abiotic (non-living) processes such as deposition (geol ...
s of the
Indo-Pacific
The Indo-Pacific is a vast biogeographic region of Earth. In a narrow sense, sometimes known as the Indo-West Pacific or Indo-Pacific Asia, it comprises the tropical waters of the Indian Ocean, the western and central Pacific Ocean, and the ...
, from
East Africa
East Africa, also known as Eastern Africa or the East of Africa, is a region at the eastern edge of the Africa, African continent, distinguished by its unique geographical, historical, and cultural landscape. Defined in varying scopes, the regi ...
to
Tahiti
Tahiti (; Tahitian language, Tahitian , ; ) is the largest island of the Windward Islands (Society Islands), Windward group of the Society Islands in French Polynesia, an overseas collectivity of France. It is located in the central part of t ...
.
[Mills, D. ''Eyewitness Handbooks Aquarium Fish: The Visual Guide to More Than 500 Marine and Freshwater Fish Varieties''. pg. 284.]
Description
The fish is bright red with thin white lines crossing from the gill cover to the caudal peduncle. The gill cover has two vertical white lines. A third line runs along the upper lip and below the large eye.
[
]
In captivity
This species is sometimes kept in aquaria. It is an active, shoaling
In biology, any group of fish that stay together for social reasons are shoaling, and if the group is swimming in the same direction in a coordinated manner, they are schooling. In common usage, the terms are sometimes used rather loosely. Ab ...
fish which is kept in large tanks with other individuals of the species. Other species of a similar size can be kept with it, but it may eat smaller fish. It can be sustained on meat-based fish food.salinity
Salinity () is the saltiness or amount of salt (chemistry), salt dissolved in a body of water, called saline water (see also soil salinity). It is usually measured in g/L or g/kg (grams of salt per liter/kilogram of water; the latter is dimensio ...
is 1.020 to 1.025.Aquatic Community
/ref>
References
External links
*
diadema
Fish of Hawaii
Fish described in 1802
{{Beryciformes-stub