Splash tetra (Copella arnoldi)

The splash tetra is a small, slender fish with a standard length of 3 to 4 cm (1.2 to 1.6 in). The mouth is relatively large and upturned, with acutely pointed teeth; this contrasts with the more horizontal mouth of the rather similar pencil fishes (Nannostomus). The maxillary bones are curved in an S-shape and the nostrils are separated by a ridge of skin. There is a dark spot on the dorsal fin and a dark line from the snout to the eye, which may continue to the operculum. There is no lateral line and no adipose fin.

In Aquariums and Zoos: relative rare in european aquariums