Black Diamond Piranha 5.5-6" (Serrasalmus Rombeus)
(fwf piranha serra diam black 6)
The Black Diamond Piranha is very similar to the Black Piranha, the only difference is the Diamond's body has large silver scales on it, It almost looks like some one sprinkled gliter all over its body. The body is also higher (Diamond shaped) hence giving the name Diamond.
At least 45cm. (18"), according to South American locals even as much as 55cm. (22"), and possibly even larger. These claims however still have to be substanciated.
Compared to most other piranha species, there is relatively high number of larger specimen in home and public aquaria (12" and above), although true giants (18"+) are very rare. This species has a notoriously slow growth rate.
- No clear terminal band (hyaline edge) on tail fin.
Juveniles and sub-adults can be kept in a tank measuring 32x14". Adult fish need a tank of at least 60x20x20" (and even more for very large specimen, 12" and more - fish that big are quite rare in captivity however).
Young Rhombeus Piranha's can be very shy. Therefore, they need a well planted tank with bog wood or rocks to provide shelter. When larger, this species becomes very agressive, and places to hide are no longer really necessary.
NONE. Black Diamonds must be kept in thier own tank due to their super aggressive nature. They make a beautiful show speciman. It is a beautiful site to see the light reflect off their Silver body when they are swimming in a well lit tank.
Black Diamond Piranhas will accept all common food items, like fish fillets, frozen smelt, live feeders, shrimp and other crustaceans, insects and, when large enough, mammals, reptiles and amphibians.
In the wild, Black Diamond Piranhas are a parasitic fin nipper when young, and become a full blown predatory carnivore when older. They will, almost without exception, not tolerate anything else living in its tank. Even much larger fish will be attacked, nipped and injured over and over, until they finally perish.
This large, and very powerful species of piranha is not considered dangerous to man in its wild state, but it can deliver extremely painful wounds. It is said that a mature Black Diamond Piranha (Serrasalmus Rhombeus) is capable of severing a man's hand at the wrist in two or three bites, and given the potential size of this large and very powerful species, it's hard to believe this is a gross exaggeration.
When we are talking about the Serrasalmus Rhombeus Piranha, we are actually referring to a complex of several different forms and closely knit species of fish, all with slightly different habits and appearences. Some varieties are the Xingù, Highback, Gold Diamond, Blue Diamond, Black Diamond and Jet Black Rhombeus. Due to their highly intolerant behavior, these fish should be kept solitary, and are best suited to large display aquariums. In the wild, this species is observed to travel and co-exist in small, loose groups, but in general they prefer a solitary life in the wild.
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