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Fish Archive Aquarium Glaser GmbH

Serrasalmus maculatus und S. marginatus

There are only few fishes in the World that are so commonly known like the piranhas from South America. There are three species, all belonging to the genus Pygocentrus, which hunt in packs and feed on meat. It is far less known that there exists a large number (more than 20, the systematics of these fishes are still under research) of solitairy living species, which have specialized in feeding on parts of the finnage of other fish. Besides this they feed, however, also on small complete fish and invertebrates. These species belong to genus Serrasalmus. They are so common in nature that hardly a larger fish with undemaged finnage can be found in the wild. From Paraguay currently two species of Serrasalmus are known, we could import both of them: Serrasalmus maculatus and S. marginatus. In respect of coloration both species look quite similar. However, they have different body shapes. S. maculatus has an almost straight back and the anterior border of the anal fin is straight; S. marginatus has a rounded back and the anterior border of the anal fin forms a hook. Body coloration varies a lot individually. There do exist specimens with many spots and specimens without spots at all: in some specimens the spots are meltet to vertical stripes. All these varieties can be found within a single importation and so it is not likely at all that this represents geographical varieties. Both Serrasalmus species can get about 20 cm in length. Due to their very special feeding habit they can be kept only alone (one fish) in a single species tank. Only for breeding purposes the sexes can be put together. Both species take parental care. Females can be distinguished from the males by the shape of the anal fin, which is larger in males. S. maculatus has relatively often been bred under aquarium conditions. They prefer to spawn in the roots of swimming plants like Eichhornia crassipes. S. marginatus is a real rarity in the aquarium and so to the best of our knowledge no breeding reports exist. It has been observed in the wild that they spawn in nests made from plants near the bottom. In the aquarium these Serrasalmus species can be fed with frozen fish (smelt, Osmerus erperlanus) which is readily taken and all types of large livefood. For our customers: the fish have code 292264 (maculatus) and 292303 (marginatus). Please note that we exclusively supply the wholesale trade. Lexicon: Serrasalmus: Latin, means "serrated salmon"; this refers to the saw-like scales on the anterior belly and the adipose fin, which reminded the describers on the adipose fin in salmons. maculatus: Latin, means "spotted": marginatus: Latin, means "bordered". Text & photos: Frank Schäfer

Archived on 03.2010
Maximum size 20-25 cm
Size available 6-15 cm
Origin Paraguay
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