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Johnius Sasakii
''Johnius'' is a genus of marine ray-finned fishes belonging to the family Sciaenidae, the drums and croakers. They are commonly known as croakers due to their ability to produce purring, croaking and knocking sounds. The sounds are produced mainly at night and are thought to be either involved in defense or for courtship. Taxonomy The genus name was erected by Marcus Bloch in 1793 based on a specimen obtained from Tranquebar from Reverend Christoph Samuel John which was named as ''Johnius carutta''. There are about 36 species in the genus, all within the Indo-West Pacific waters. This genus has been placed in the subfamily Otolithinae by some workers, but the 5th edition of ''Fishes of the World'' does not recognise subfamilies within the Sciaenidae which it places in the order Acanthuriformes. Two subgenera are recognised within the genus ''Johnius'', the nominate subgenus has an inferior mouth with the teeth on the lower jaw being uniform in size, although there may be a sma ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Johnius Amblycephalus
''Johnius amblycephalus'', the bearded croaker, also known as the green-backed croaker or sharp-nosed jewfish, is a marine ray-finned fish belonging to the Family (biology), family Sciaenidae, the drums and croakers. This fish is found in the Indian and Pacific Oceans. Taxonomy ''Johnius amblycephalus'' was first formally Species description, described as ''Umbrina amblycephala'' in 1855 by the Dutch physician, herpetologist and ichthyologist Pieter Bleeker with its Type locality (biology), type locality given as Ambon Island. Bleeker's name replaced ''Umbrina dussumieri'' which had been coined by Achille Valenciennes in 1833 but which was invalid as it was preoccupied by Georges Cuvier's 1830 ''Johnius dussumieri, Corvina dussumieri''. This species is classified within the Nominate (taxonomy), nominate subgenus of ''Johnius''. This species has been placed in the subfamily Otolithinae by some workers, but the 5th edition of ''Fishes of the World'' does not recognise subfamilies wi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |