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Asterophysus batrachus KNER, 1858

Gulper Catfish

February 8th, 2014 — 2:49pm

An obligate predator by nature, but captive specimens readily accept strips of white fish, whole shrimp, earthworms, and similar once they are recognised as food.

Adult individuals are unlikely to require feeding on a daily basis with 1-2 meals per week sufficient.

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Centromochlus macracanthus SOARES-PORTO, 2000

July 19th, 2013 — 4:37pm

All members of the family Auchenipteridae are thought to practise internal insemination and females can carry mature, unfertilised eggs and sperm packets inside the body for unspecified periods of time.

When conditions are satisfactory fertilisation is triggered and the eggs deposited, and there is n…

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Laetacara fulvipinnis STAECK & SCHINDLER, 2007

July 19th, 2013 — 2:25pm

Has been collected from habitats containing clear, soft, acidic, tea-coloured blackwater, most typically among leaf litter or submerged vegetation in very shallow (10-50 cm depth) water along the margins of streams and other minor tributaries.

At a village called El Niñal close to the mouth of the rio Pasimoni in the Casiquiare drainage pH was…

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Leporinus brunneus MYERS, 1950

February 27th, 2013 — 3:32pm

Décor is relatively unimportant and maintenance simple provided sufficient space is available.

A natural-style arr…

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Corydoras amandajanea SANDS, 1995

December 11th, 2012 — 12:00pm

C. amandajanea is rare in the aquarium trade and appears to be variable in colour pattern to an extent, with some individuals posssessing relatively larger dark spots on the body, for example.

Unfortunately diagnostic characters cannot be provided since we’ve been unable to obtain the type description, and little has been written about this species since it was published.

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Nannostomus marilynae WEITZMAN & COBB, 1975

Greenstripe Pencilfish

October 26th, 2012 — 4:51pm

This species is also known as ‘Marilyn’s pencilfish’. It’s rarely traded in numbers and more often seen as bycatch among shipments of other species, particularly Paracheirodon axelrodi.

It can be identified by the following combination of characters: three dark lateral stripes (sometimes referred to as primary, secondary, and tertiary); nocturnal oblique bars relatively narrow, with the anterior bar reaching, but not extending past, the anterior base of the dorsal-fi…

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Nannostomus anduzei FERNANDEZ & WEITZMAN, 1987

October 18th, 2012 — 4:31pm

This is the smallest member of the genus and rarely traded in numbers, though it’s a relatively common contaminant among shipments of wild fishes from Manaus. Unlike other Nannostomus spp. it does not exhibit a specific colour pattern of spots or bars at night-time, rather displaying an overall paleness.

The family Lebiasinidae is included in the order Characiformes and sometimes split into the nominal subfamilies Lebiasininae a…

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Apistogramma mendezi RÖMER, 1994

A220, A221, A222

March 26th, 2012 — 10:46am

This species is assigned the codes A220, A221 and A222 under the DATZ ‘A’ number system with these referring to similar-looking, possibly conspecific, populations.

These differ in some aspects of colour pattern, particularly the orientation of the caudal-fin markings which may be horizontal, vertical, or somewhere inbetween.

One population displays an orange colouration on the belly and is som…

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Apistogramma sp. 'breitbinden'

A164, A165, A167

March 13th, 2012 — 1:26pm

The German term 'breitbinden' translates literally as "broad-banded" and refers to the uniformly broad suborbital stripe seen in males of this 'species' which remains undescribed despite being known in the aquarium hobby for several decades. It's often imported as bycatch among shipments of wild-collected A. iniridae.

Some of the populations have also been assigned th…

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Biotodoma wavrini (GOSSE, 1963)

Orinoco Eartheater

March 13th, 2012 — 1:26pm

Populations known in the aquarium trade include ‘Cuao’, ‘Orinoco’, ‘San Antonio’, and ‘Sipapo Ventuari’.

B. wavrini and its congener B. cupido can be separated by body shape and position of the dark blotch on the posterior portion of the flank. In B. cupido the body is relatively compact and the blotch located above the upper lateral line, whereas in B. wavrini the body is noticeably elongate and the blotch on or below the upper lateral line.

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