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The Coconut Octopus

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by

sonnet pradel

on 24 April 2014

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Transcript of The Coconut Octopus

Habitat and Distribution
Muddy or sandy habitat
0-44 m deep
Prefers calmer bays or lagoons
Warm salt water
8.2 pH level
No ammonia
Nitrates 30 parts per million
Sand deep enough to bury themselves in

Physical Traits
About 8 cm long
15 cm long tentacles
Dark lines resmble veins
Usually dark bodies with white or blue suckers
Yellow Siphon
Feeding
Eats small shrimp, crabs, and clams
Emerge from shelter at dawn and dusk
Uses arms to fish out prey from mud
The Coconut Octopus
Amiphioctopus Marginatus

Classification
Species: Marginatus
Genus: Octopus
Family: Octopodidae
Order: Octopoda
Subclass: Coleoidea
Class: Cephalopoda
Phylum: Mollusca
Digestive System
Beak tears (or drills) into flesh of prey
Salivary glands secrete immobilizing and digestive enzymes
Esophagus and crop continue digesting
Stomach churns food
Nervous System
Most complex invertebrate brain
Statocyst, located near the brain, measures gravity and acceleration changes
2/3 of nervous system located in arms
Have rectangular pupils, and advanced cornea, lens, iris and retina
Focuses on images by moving lens and retina apart
Can form images and perceive shape, color intensity and texture
Interesting Behaviors
Carry coconuts and shells
Use for protection against predators
First invertebrate to use tool
Unique: save the shells for later
"Stilt-walking"
Up to 20m
Create shelter from the cups, stick legs out and walk
Reproduction
Male deposits spermataphore packets into the female
Female broods her eggs by creating a safe haven within her webbing
Female dies when eggs begin to hatch
Lay up to 100,000 eggs
When hatched, float on the current as planktonic young
Life History
Coconut carrying discovered in 2009
Future use of shell also followed in 2009
excavation and storage
Bibliography
http://australianmuseum.net.au/Veined-Octopus-Octopus-marginatus/

http://tolweb.org/accessory/Cephalopod_Digestive_System?acc_id=1993

http://faculty.washington.edu/chudler/invert.html

http://news.bbc.co.uk/2/hi/8408233.stm



http://www.sportdiver.com/keywords/marine-life/reef-encounters-veined-octopus-and-her-eggs

http://www.britannica.com/EBchecked/topic/1656194/veined-octopus
Full transcript