Kevin Burgee Teuthowenia pellucida Phylum Mollusca Class Cephalopoda Order Teuthida Family Cranchiidae Contains about 60 species of squid also known as cockatoo squid cranchiid ID: 476466
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Slide1
Glass Squid
Kevin BurgeeSlide2
Teuthowenia
pellucida
Phylum: Mollusca
Class: CephalopodaOrder: TeuthidaFamily: CranchiidaeContains about 60 species of squidalso known as cockatoo squid, cranchiid, cranch squid, or bathyscaphoid squidSlide3
occur in surface and
midwater
depths of open oceans around the
worldUsually around 7500 ftJuvenile glass squid are found closer to the surfaceSlide4
Bioluminescence
Some species have bio-luminescent light under the eyes to help cancel out there shadow for
camouflage
The light tips, photophores, also help in finding a mateThe use of bioluminescence requires ATPSlide5
Characteristics
Eye morphology varies widely, ranging from large and circular to telescopic and
stalked
Often the only visible organ is the digestive gland which is the equivalent to a liver in mammalsHave a large chamber filled with ammonia to help with buoyancyBody size can vary from 3.9 inches to over 6 feetSlide6
Has eight short tentacles with a slightly longer pair at the end of its body
As a defense, the squid is able to engorge itself with surrounding water to dramatically increase in size, appearing more
intimidating
Has the ability to use jet propulsion to escape predatorsThey spend most of their lives in partially lit water where their transparency helps avoid detectionSlide7
Females
Females are slightly larger than
males
Eggs are laid in clusters, attached to rocks and plants on the sea floorPregnant glass squid carry about 6,000 to 8,000 eggs at a timeSlide8
Facts
series of small, glandular organs
lie
dorsal to the gladius at the anterior end of the mantle. The chambers of each organ open to the exterior. The function of these organs is to secrete pheromones to attract malesIn some cases, cannibalism has occurred during matingTentacles are long in larvae, rather than short in adultsSlide9
The deep sea glass squid prey on many deep sea fish
Ex. the goblin shark
Glass squid that are closer to the surface eat sea birds that land on the waterSlide10
Cranchia
scabra
is a species of glass squidIts body is covered with cartilaginous spikes. When threatened it withdraws its arms and head into the mantle and swell up into a giant spiky ballIn addition, it may ink into its mantle to make it no longer transparent