What is a spiny dogfish shark?
The spiny dogfish is a small schooling shark that forms groups of hundreds or thousands of individuals of the same sex and size. It is one of the most abundant demersal shark species. This shark is gray or brownish on top and pale gray or white on its ventral side with irregular white spots on the top or sides of the body.
What is the external anatomy of a dogfish shark?
External Anatomy of the Dogfish Shark •Along the sides of the body is a light-colored horizontal stripe called the lateral line. The line is made up of a series of tiny pores that lead to receptors that are sensitive to the mechanical movement of water and sudden changes of pressure. •The spiny dogfish has a double dorsal fin. The
How many spines does a dogfish have?
The spiny dogfish has the presence two spines, one immediately in front of each dorsal fin. The spines carry a poison secreted by glands at their base. •The caudal finis divided into two lobes: a larger dorsal lobe and a smaller ventral lobe. This type of tail is known as a heterocercal tail.
What family does a dogfish belong to?
It belongs to the Squalidae family and is in the Chondrichthyes class. There are 40 different species in the Squalidae family. Recently, scientists determined that the Spiny Dogfish that live in the northern Pacific Ocean were a separate species.
Can you keep a dogfish with sharks?
Dogfish Care As smaller, bottom dwelling species, these sharks are generally more successful in aquariums than their larger counterparts. You can house them in tanks with other sharks of similar size, but they will usually eat any smaller fish or crustaceans you keep with them.
How does a dogfish shark reproduce?
•Males have stout, grooved copulatory organs called clasperson the inner side of their pelvic fins. Fertilization in the dogfish shark is internal. During copulation, one of the claspers is inserted into the oviduct orifice of the female.