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PROFILESEARCH

Acestrorhynchus falcirostris (CUVIER, 1819)

March 13th, 2012 — 1:26pm

This species is a member of the putative A. nasutus group of closely-related species within the genus alongside A. nasutus, A. maculipinna and A. isalineae.

These are characterised by possession of two dark, longitudinal stripes, one running from the tip of the snout to the base and the other from the posterior edge of the lower maxilla to the underside of the caudal peduncle.

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Crenuchus spilurus G√úNTHER, 1863

Sailfin Characin

March 13th, 2012 — 1:23pm

This species is currently the only described member of its genus although colour pattern and morphology vary considerably across its range.

You may see reference to this species being the only fish species to possess infra-red vision, but other species also possess this ability and we suspect that infra-red plays an important role in the reproductive cycle of many fishes.

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