Marbled hatchetfish (Carnegiella strigata) can be found in Colombia, Venezeula, the Guyanas, and northeastern Brazil. This is a favorite among freshwater aquarium hobbyists. This deep bodied 2.5 inch fish has a orange median line marked by black below. The tail is forked. There are black irregular markings on the body.

Hatchetfishes (Family Gasteropelecidae) are native to the New World tropics of northern South America and southern Central America. These are deep bodied with large winged like pectoral fins. They are good jumpers that can glide in the air. Innes notes these fish have strong muscles and can flap their wings. These unusually shaped fish contain several kinds that are frequently sold in pet stores.

Order Cypriniformes contains the majority of the world's freshwater species of fish. Included in this order are the minnows, carp, and many other groups of fish.

Bony fish, Class Teleostomi, are a class of chordates that include the majority of fish-like animals found on earth. They are characterized by a bony jaw and a bony skeleton. They are found in both fresh and marine waters.

Backboned Animals (Phylum Chordata) are the most advanced group of animals on earth. These animals are characterized by having a spinal cord or backbone. Most members have a clearly defined brain that controls the organism through a spinal cord. Fish, amphibians, reptiles, birds, and mammals are in this phylum.

Currently, some taxonomists believe that the fish should be divided into two groups (sharks and regular fishes) and that there are some other primitive groups in the phylum such as hagfish or lampreys.

Animal Kingdom contains numerous organisms that feed on other animals or plants. Included in the animal kingdom are the lower marine invertebrates such as sponges and corals, the jointed legged animals such as insects and spiders, and the backboned animals such as fish, amphibians, reptiles, birds, and mammals.

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