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Acestrorhynchus isalineae MENEZES & GÉRY, 1983

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 all 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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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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Acestrorhynchus microlepis (JARDINE, 1841)

March 13th, 2012 — 1:26pm

An obligate piscivore capable of consuming quite large prey in relation to its body size although it tends to focus on smaller prey such as tetras and related species.

Newly-imported specimens may refuse to accept anything but live fishes although most can be weaned onto dead alternatives once they recognise them as edible, and some even learn to accept dried foods.

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Acestrorhynchus pantaneiro MENEZES, 1992

March 13th, 2012 — 1:26pm

An obligate piscivore capable of consuming surprisingly surprisingly large prey.

Newly-imported specimens may refuse to accept anything but live fishes although most can be weaned onto dead alternatives once they recognise them as edible, and some even learn to accept dried foods-

Like the vast majority of predatory fishes this specie…

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Acestrorhynchus altus MENEZES, 1969

March 13th, 2012 — 1:26pm

This species is not normally aggressive towards conspecifics with juveniles in particular exhibiting a marked schooling instinct.

Older individuals tend to be more solitary but still group together from time-to-time, and it’s best maintained in numbers of four or more.

One important point to note is that acestrorhynchids are can…

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Acestrorhynchus falcatus (BLOCH, 1794)

Red-tailed Freshwater Barracuda

March 13th, 2012 — 1:22pm

The vernacular name of this fish is derived from its appearance and behaviour, rather than a genetic association with the marine barracuda, and it’s also sometimes referred to as ‘pike characin’ or ‘spotted cachorro’ with local vernacular names including ‘Grand dent-chien’ (French Guiana), ‘ Cachorrinho’ or ‘Ueua’ (Brazil).

Although most species of Acestrorhynchus appear superficially similar to one another most exhibit distinguishable external chara…

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