The systematic analysis of the health of aquatic organisms may provide an important indicator for the evaluation of the water quality of natural aquatic environments. Inadequate water quality may provoke a wide range of problems in aquatic organisms, including genetic mutations, infectious diseases, behavioral modifications, physical dysfunction (including reproduction) and deformations or dysp...

An unusual colour morph of a probable Holacanthus ciliaris was observed in Dry Tortugas, Florida, which can possibly be explained by recessive homozygosity, however, further testing is necessary. This variation of H. ciliaris has previously only been described at St Paul's Rocks, Mid-Atlantic Ridge.

The kinematics of turning manoeuvres and the distance-time performance in escape responses of startled angelfish {Pterophyllum eimekei) are investigated employing high-speed cinematography (400Hz). All escape responses observed are C-type fast-starts, in which the fish assumes a C shape at the end of the initial body contraction (stage 1). Kinematic analysis of the subsequent stage (stage 2) al...

The freshwater angelfishes (Pterophyllum) are South American cichlids that have become very popular among aquarists, yet scarce information on their culture and aquarium husbandry exists. We studied Pterophyllum scalare to analyze dietary effects on fecundity, growth, and survival of eggs and larvae during 135 days. Three diets were used: A) decapsulated cysts of Artemia, B) commercial dry fish...