Fluffy sculpin
| Fluffy sculpin | |
|---|---|
| |
Scientific classification 
| |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Actinopterygii |
| Order: | Scorpaeniformes |
| Family: | Cottidae |
| Genus: | Oligocottus |
| Species: | O. snyderi
|
| Binomial name | |
| Oligocottus snyderi | |
The fluffy sculpin (Oligocottus snyderi) is a fish species in the sculpin family Cottidae. It inhabits the coastal northeastern Pacific Ocean, ranging from Sitka, Alaska to Baja California (Mexico). Individuals reach up to 9 cm (3.5 in) in length, and are commonly found in tidepools, often associated with algae.[2][3]
Description
The fluffy sculpin grows to a length of about 9 cm (3.5 in). The dorsal fin has 7 to 9 spines and 17 to 20 soft rays, and the anal fin has no spines but 12 to 15 soft rays.[3] In the male, the first anal ray is enlarged and the first three rays are separated from the others. The body is smooth and lacks scales. There is a short spine on the snout with a cirrus beside it, and tufts of cirri on the top of the head, along the lateral line and at the base of the dorsal fin. The colour of this fish is variable, being anything from green to pink or reddish-brown.[2][clarification needed]
Distribution and habitat
The fluffy sculpin is native to the western coast of North America, its range extending from Sitka, Alaska to Baja California. It is found on rocky coasts, being present from the mid littoral zone to the shallow subtidal zone. When the tide is out, it occupies rock pools on the lower shore. When the tide comes in, it forages over a wider area.[4]
The fluffy sculpin occupies much the same range as the tidepool sculpin (Oligocottus maculosus) but the two do not seem to be in direct competition for resources as the fluffy sculpin chooses pools further down the beach where the water remains cooler. Both species can return to their home pool if displaced to a nearby locality outside their immediate home range.[5]
Ecology
The fluffy sculpin is a predator, the diet consisting mainly of amphipods and polychaete worms. Larger individuals also feed on small shrimps and crabs. Spawning takes place in winter and spring. The male's first anal ray is prehensile and is used as a clasper to hold onto the female. Fertilisation is internal, with clusters of eggs being laid on rocks and guarded by the male. The larvae are planktonic in the open sea and metamorphosis into juvenile fish probably occurs at times when the upwelling of nutrient-rich water occurs along this coastline.[4]
If conditions deteriorate in the pool inhabited by the fluffy sculpin when the tide is out, it is able to leave the water and breathe air.[6] It is less tolerant of adverse conditions than the tidepool sculpin.[7]
References
- ^ Bailly, Nicolas (2008). "Oligocottus snyderi Greeley, 1898". WoRMS. World Register of Marine Species. Retrieved 27 October 2017.
- ^ a b Eschmeyer, William N.; Herald, Earl S. (1999). A Field Guide to Pacific Coast Fishes: North America. Houghton Mifflin Harcourt. pp. 177–179. ISBN 0-618-00212-X.
- ^ a b Froese, Rainer; Pauly, Daniel (eds.). "Oligocottus snyderi". FishBase. March 2016 version.
- ^ a b Theodore, Lauren (2004). "Oligocottus snyderi: fluffy sculpin". Animal Diversity Web. Retrieved 27 October 2017.
- ^ Horn, Michael H.; Martin, Karen L.M; Chotkowski, Michael A. (1998). Intertidal Fishes: Life in Two Worlds. Academic Press. pp. 184–185. ISBN 978-0-08-053493-0.
- ^ Encyclopedia of Fish Physiology: From Genome to Environment. Academic Press. 2011. pp. 380–381. ISBN 978-0-08-092323-9.
- ^ Allen, Larry G.; Horn, Michael H. (2006). The Ecology of Marine Fishes: California and Adjacent Waters. University of California Press. p. 207. ISBN 978-0-520-93247-0.