...."The two species of Hypselecara, as presently defined, are easily differentiated. The overall appearance of H. temporalis is almost "square" due to its steep profile, while H. coryphaenoides is more elongate with a gradually elevated profile. There are also color differences between the species. The form of H. temporalis common in the hobby is a green and red-wine fish with a darker lateral blotch centered below the lateral line; H. coryphaenoides is dark-brown to black with a blotch centered above the lateral line and extending into the base of the soft dorsal fin. Unfortunately, two factors complicate identification efforts. First, markings in H. temporalis tend to be quite variable depending on geographical origin; second, H. coryphaenoides is subject to great changes in color and pattern depending upon "mood." As a helpful guideline, wild H. temporalis are usually collected in Peru, while H. coryphaenoides is most often taken in Brazil."