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Piranha Profile Of The Month

ksls
- 01-29-12 14:57 - 12 comments

Scientific name:

Serrasalmus geryi

Author:

Jegu & Dos Santos, 1988

Common namen:

Geryi Piranha, Violet Line Piranha.

Distribution:

Brazil: Para - Araguacema, Rio Araguaia.

Appearance:

Morphology (Body Characteristics)
Body shape is similar to other compressus group members and are very laterally compressed such as; S. altuvei, S. hastatus, S. compressus and S. altispinis. The fish is distinctive at all ages with its broad stripe running from lower mouth to top of beginning of dorsal fin.

Color of Life
Silvery bodied fish with numerous small spots on the flanks. Anal fin is hyaline with a broad black margin. Pectoral and ventral fins are clear. A humeral spot may be present. Eyes silvery to reddish-orange.

A quick visual reference to identify this fish
• Reddish-orange eyes
• Violet line running from the lower jaw, over the back until the base of the tail fin
• Concave headshape

Maximum Size
Approx. 25 cm. (10") TL.
Specimen over 20 cm. (8") TL are quite rare in captivity.

Sexing
Not sexually dimorphic: males and females look similar.
Care:

Minimum tank size
Recommended tank size for an adult specimen is 120x45x50 cm. (48x18x20").
Juvenile specimen can be kept in a smaller tank: minimum 60x30x30 cm. (24x12x12").
This is one of the few Serrasalmus species that have successfully been kept in a group for a while: minimum recommended size to attempt this is 150x50x60 cm. (60x20x24") - only to be attempted by very experienced piranha keepers that know exactly what they are doing, and know what risks are involved!

Tank Requirements
Plants, drift wood or rocks provide hiding places, the tank lights should be dimmed.
Heavy filtration required to deal with the large amounts of waste this fish produces. A powerhead can be added to provide currents.
Dangerous to hands and other extremities. Care is required in handling.

Water temperature
24-29 degrees Celsius (76-84 degrees Fahrenheit).

Water chemistry
pH should be between 6.0 - 8.0, ideal is slightly acidic to neutral water: pH 6.5 - 7.2
Soft water is preferred.

Compatible Species
Although this species has successfully been kept in a group, it is highly recommended to keep the Geryi Piranha as a solitary fish: it remains a parasitic and highly aggressive species.

Breeding
No instances of captive breeding have been reported as of yet.

Diet
Fish (whole, fillet or feeders *), shrimp, cockles, mussels, squid, insects, earth worms, pellets.
Food items such as poultry, mammal meat and organ meat should be fed sparsely: once or twice a month at most. Meat needs to be unseasoned and trimmed of any fat.
On rare occasions this species accepts vegetables, nuts seeds or fruit as well.

* Live fish need to be quarantined first, so they are safe to feed (containing no diseases or parasites). Goldfish, minnows and other members of the Cyprinid family (Carp-like fish) should be avoided, as these fish contain growth-inhibiting hormones (Thaiminase/Vitamine B1 inhibitors) that could negatively affect the fish's health and development.

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