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Stegastes
''Stegastes'' is a genus of ray-finned fish in the family Pomacentridae. Members of this genus are marine coastal fishes except for ''S. otophorus'', which also occurs in brackish water. These fish are known by the names of damselfish, gregory and major. They are small tropical fish associated with coral and rocky reefs in the Atlantic, Indian and Pacific Oceans. They are sometimes found in the aquarium trade where they are an easy-to-keep fish, but they do not mix well with other fish of their own or other species because of their territorial habits and aggressiveness.
==Description==
The largest species in the genus is ''S. acapulcoensis'', which grows to a maximum length of , while the smallest is ''S. pictus'' at .
〔(【引用サイトリンク】title=''Stegastes'' )〕 Members of this genus are deep-bodied and laterally flattened fish with forked tails. The head has a blunt snout, a small, terminal mouth, a nostril on each side of the face, and large eyes. The lateral line does not run the full length of the body and has gaps in it. A single large dorsal fin is present and the anal fin has two, or rarely three, spines. The colour varies with the species and sometimes varies in different parts of the fish's range. Juvenile fish tend to have bright colours which are completely different from the appearance of adults of that species.〔(【引用サイトリンク】title=Family Pomacentridae - Damselfishes )〕
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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