Humboldt Squid

Topics: Squid, Giant squid, Ommastrephidae Pages: 4 (771 words) Published: March 20, 2013

Humboldt Squid
Dosidicus gigas

Domain: Eukarya

Kingdom: Animalia
Phylum: Mollusca
Class: Cephalopoda
Order: Teuthida
Suborder: Oegopsina
Family: Ommastephidae
Genus: Dosidicus
Species: Dosidicus gigas

Geographic range:
Receives its name from its main location - the Humboldt Current This current is found in the East Pacific Ocean region
The Humboldt squids are sometimes found along the coastal region of California, Oregon, Alaska and Washington Generally, found about 2,300 feet below surface
Enter shallow waters to lay eggs
Trophic level:
Sharks, dolphins, whales, tuna swordfish, many types of rays as well as an abundance of crustaceans, mollusks, fish of all  sizes, and other cephalopods such as octopus can be found in the food web of the Humboldt The Humboldt is occupies a relatively high trophic level

It feeds on krill and small species of fish
Sperm whales, sharks, seals, swordfish, and marlin feed on Humboldt squids of all sizes, while gulls and large fish often capture juveniles Parasites include Chromidina elegans, a ciliate protozoan that lives inside the renal organs of the Humboldt Life Cycle:

Average life span is 1 year; however, some can live up to 2 years Spend much of their short life in the ocean’s oxygen-minimum zone Come up at night to feed
After 200 days, the squids reach sexual maturity
They die shortly after mating

Bilateral symmetry
Arms and tentacles - 8 arms and 2 retractable tentacles
Mantle - hollow structure and so internal organs are all exposed directly to the ocean water Funnel - water is pumped from out of the mantle to the funnel, which allows squids to move Fins - are used for both maintaining position and generating thrust Chromatophores - tiny elastic sacs of pigment. The Humboldt squid can turn their entire bodies from red to white to red again in less than one second Digestive system:

Complete and ciliated
Mouth, anus and complex stomach...
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