Home > Animals > Fish > Spiny dogfish

Spiny dogfish

(Squalus acanthias)


Category: Fish



This common species is one of the most familiar species of the Squalidae family. It is found nearly worldwide and tends to inhabit shallow, temperate waters. It is a commercially valuable species and is a popular food in many parts of the world. Dogfish and their byproducts are also used for fertilizer, liver oil, dissection specimens, and pet food – unfortunately, this popularity has led to major declines in dogfish population due to unsustainable fishing practices.


Data & Facts

Scientific Classification
Kingdom - Animalia
Phylum - Chordata
Class - Chondrichthyes
Order - Squaliformes
Family - Squalidae
Genus - Squalus
Species - S. acanthias

Did you know?
Interesting Animal Facts

Undersea Conversations…

While it isn’t obvious, fish have ears, and are able to communicate to one another through sounds. They don’t have vocal chords, but instead vibrate their swim bladders, producing popping, grunting, moaning, barking, or chirping noises. While some species of fish, like the goldfish, are silent listeners, there are over 1000 species that are known to vocalize, and some, like the gurnard who are veritable chatterboxes. While we can’t have a conversation with them - at least not yet - it is theorized that they do it to attract mates, frighten away predators or competitors, to synchronize mating, call for help and warn others, or to orient themselves.

Learn more >>


NAIA - National Animal Interest Alliance Discover Animals is a web-based educational resource offered by the NAIA
To learn more about the NAIA or about other NAIA programs, visit us at www.NAIAOnline.org
if you would like to help, join or support the NAIA or any of its programs please click here >>