In Depth As a ‘spiny shark’ Climatius was not a true shark but was still related to them. Climatius was probably an open water hunter of smaller fish, and two clues to indicate this are both the strongly developed caudal fin and the large pectoral fins. As the caudal fin (loosely dubbed the tail) propelled … Read more
In Depth Parexus is a genus of acanthodian (often dubbed spiny shark) fish that lived in the waters of what is now Scotland during the early Devonian. Acanthodian fish are noted for their large spines which may have initially developed for defence against the mouths and throats of larger predators. However, some of these spines … Read more
In Depth Acanthodes was what is called a spiny shark, a type of fish that are related to true sharks. The spiny sharks had spines that supported their fins as well as providing some defence against predators. Acanthodes however actually has relatively few spines for a spiny shark with a total of six spines being … Read more
In Depth Tetanopsyrus is a genus of small acanthodiian fish that has been discovered in Canada. Further Reading - Tetanopsyrus lindoei, gen. et sp. nov., an Early Devonian acanthodian from the Northwest Territories, Canada. Acta Geologica Polonica 49:81–96. - P.-Y. Gagnier, G. F. Hanke & M. V. H. Wilson - 1999. - New species of … Read more