Fierce and gigantic, if you ever see or come across an arapaima fish along the rainforest rivers of the Amazon, then you will ...

Almost all animals have symmetrical bodies. Bilateral symmetry is almost universal in all animals and is only very rarely ...

The digestive tract of teleost fish exhibits an impressive degree of histological diversity that reflects the range of feeding strategies found in this group.

The Centro Nacional de Investigación sobre la Evolución Humana (CENIEH) participated in a study, published in the Journal of ...

Which genetic factors can break the symmetry of an animal's body? To answer this question, a Konstanz research team led by ...

Learn about the evolutionary ease of cichlid fishes, which transition from simple to complex teeth (and vice-versa) faster than other fishes.

A research team from the University of Manitoba has discovered a new genus of placoderm fish, named Elmosteus lundarensis, one of the earliest fish to develop bones, a jaw and teeth.