Spiny dogfish
| Spiny dogfish |
|---|
|
| Scientific Classification |
|
| Binomial Name |
|
squalus acanthias |
The spiny dog fish is considered a shark for its shape and characteristics. It has a short snout, two dorsal fins, a pectoral fin, a pelvic fin and a caudal fin. The spiny dog fish has two fin spines. Male dog fish have claspers. The dogfish has a single spine in front of both of the two dorsal fins. They have three gill slits located behind the snout and the nostrils. The dogfish's spines are therefore sharp but are as well poisonous[1].
Life Cycle
The life span of the spiny dogfish is around 25 years at the lowest but the highest reported is 80 years. The spiny dogfish is ovoviviparous and its gestation period is about a year long. They eat other sea animals, like squid and other little fish[1]. The male spiny dogfish is about two feet in length and the females measure out to just over three feet in length[2]
Ecology
The spiny dogfish is native to Albania, Algeria, Argentina, Australia, Bahamas, Belgium, Bosnia, Brazil, Bulgaria, and Canada. The spiny dogfish can be found all over the place. The dogfish usually lives around 200 meters deep. The population of the spiny dogfish is decreasing due to recreational fisherman that throw them back out and then they later die or they get eaten by a bigger fish or mammal or not necessarily a bigger fish but a predator. The spiny dogfish lives in the practically all of the oceans, the Indian, the Atlantic and the Pacific ocean[1].
References
- ↑ 1.0 1.1 1.2 Spiny Dogfish a-z-animals.com. Last Modified. December 16, 2016.
- ↑ Spiny Dogfish sharkinfo.ch. Last Modified. June 4, 2016.
