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Pinecone Fish (Family: Monocentridae) - Wiki latin dict size=108   common dict size=512
이미지 정보 Original File Name: Pinecone fish, Monocentris japonica.png Resolution: 555x378 File Size: 11812 Bytes Upload Time: 2007:08:16 14:36:54
올린이 이름 (메일주소): Unknown
사진 제목 Pinecone Fish (Family: Monocentridae) - Wiki

Pinecone Fish (Family: Monocentridae) - Wiki; Image ONLY
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Pinecone Fish (Family: Monocentridae) - Wiki

Monocentridae
From Wikipedia, the free encyclopedia

[Photo] Pineconefish (Monocentris japonica) from G??nther, A.C.L.G., 1880. An introduction to the study of fishes. Today & Tomorrow's Book Agency, New Delhi.

Pinecone fishes are small and unusual beryciform marine fish of the family Monocentridae. The family contains just four species in two genera, one of which is monotypic. Their distribution is limited to tropical and subtropical waters of the Indo-Pacific. Pinecone fishes are popular subjects of public aquaria, but are both expensive and considered a challenge for the hobbyist to maintain.

Physical description
These fish are aptly named; their rounded, compressed bodies are completely covered (with the exception of the caudal peduncle) with very large, strong platelike scales fortified with prominent ridges. The first dorsal fin is composed of 4-7 strong, disunited spines which vary in length; the second dorsal fin and anal fin are small, spineless and rounded, situated far back of the convex head. The pelvic fin possesses one large erectile spine which can lock into place. The pectoral fins are somewhat elongate and the caudal fin is truncate.

Coloration is typically a yellow to orange, the scales dramatically outlined in black. The eyes are relatively large, and the mouth oblique and subterminal. On either side of the lower jaw there is a bioluminescent organ called a photophore: a pale light is produced by symbiotic bacteria within the organ, and the colour of the light varies with ambient light levels???orange by day and blue-green at night.

The Pineapplefish (Cleidopus gloriamaris) is the largest species, reaching a standard length of 22 centimetres (8.7 inches). There is no apparent sexual dimorphism.

Life history
Pinecone fishes stick to the sublittoral zone, and are associated with ledges and caves, rocky and (occasionally) coral reefs over a hard bottom. Found at 10???200 metres depth (with juveniles frequenting the shallower end of this range), Pinecone fishes are nocturnal and form schools.

The photophores are thought to play a role in attracting the zooplankton upon which the fish feed; intraspecific communication may also be a use for the light. Little is known of their reproductive biology, but they are assumed not to guard their brood.

Species

Genus Cleidopus
Pineapplefish, Cleidopus gloriamaris De Vis, 1882.
Genus Monocentris
Monocentris japonica (Houttuyn, 1782).
Monocentris neozelanicus (Powell, 1938).
Monocentris reedi Schultz, 1956.

http://en.wikipedia.org/wiki/Monocentridae
The text in this page is based on the copyrighted Wikipedia article shown in above URL. It is used under the GNU Free Documentation License. You may redistribute it, verbatim or modified, providing that you comply with the terms of the GFDL.

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