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The Dumbo Octopus (Grimpoteuthis)

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by

Isa Panzer

on 6 January 2014

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Transcript of The Dumbo Octopus (Grimpoteuthis)

Grimpoteuthis genus of the Dumbo octopus is a type of octopus named after Walt Disney's famous character Dumbo the elephant because of the ear-like fins. There are around 37 different species of Dumbo octopi. These interesting animals can be found in all oceans of the world but they are rarely seen because they live in depths ranging from 1,300 to 23,000 feet.
Most species of Dumbo octopi are small in size, usually with 8 inches in length. Largest ever recorded specimen measured 6 feet in length and weight of 13 pound
The Dumbo Octopus (Grimpoteuthis)
Meet dumbo
Body Plan
Digestion
Nervous and Respiratory system
An octopus has a highly complex nervous system, only part of which is localized in its brain. Octopus arms show a variety of complex reflex actions that persist even when they have no input from the brain.


Octopus don't have lungs. They use gills to respire. The gills are located inside the mantle cavity, behind the mouth. As the octopus moves, water gets passed into its mouth to the gills and back out. The gills are made up of many feathery filaments.
Circulation
Octopus has three hearts. Two of the three pump the blood through the gills. Octopus has three hearts. Two of the three pump the blood through the gills .The blood coursing through the three hearts of the octopus is blue, thanks to a different protein called hemocyanin.
Arms and flippers are used for swimming. Arms are equipped with small harpoon-like barbs that are designed to hold the prey.



Fastest swimming is associated with quick release of water from the funnel. This technique is used when Dumbo octopus needs to escape from the predators.
Movement
Dumbo octopus can swim by flapping the fins, by contracting and expanding its arms or by propelling the water from the funnel. They can use each of these techniques separately or swim by combining all of them.
Dumbo octopus eat different type of crustaceans, bivalve, worms on the sea bottom, and Copepods when they swim near the surface of the water. Dumbo octopus swallows the prey whole. For that reason, size of the prey never exceeds 1-2 mm.
Food
Dumbo octopus does not have mating season. Female is able to deposit eggs throughout the whole year.
Eggs are fertilized inside the female's body. Eggs that reach required maturity will be released and hiden under the rocks or shells.

Since Dumbo octopus spends most of its life on the great depths, it does not have a lot of predators. But their main predators of Dumbo octopi are sharks and killer whales.
Pearl from finding nemo is a dumbo octopus.
Reproduction and Mating
Predators
Female does not take care of the youngsters. Newly born Dumbo octopi are large in size, well developed and able to survive on their own.

One arm of males has a large segment that is used to deliver packages of sperm into female's body.
Interesting fact!
Full transcript