Monday, March 26, 2007

Blue Ring Octopus



After hearing about the blue ring octopus in class today, I decided to learn a bit more about it. This is a short video I found, it would be better with some commentary, but oh well.
The blue ringed octopus (B.R.O) is a small Marine creature and they only grow to about 20cm long. They belong to the family Octopodidae. They have soft bodies and have eight arms or tentacles like all octopi. It is normally a dark brown to dark yellow colour, but turns to a vivid yellow with noticeable blue rings when it becomes agitated. The are normally found in tropical to subtropical areas, ranging from Japan down to Australia. The reside in shallow reefs or tide pools from 0-20m in depth. When a predator comes too close, the B.R.O will secrete one of two lethal poisons. The first one is primarily effective for crabs, their main predator and food source. The second is very toxic and use as a defense mechanism against other predators. Once the predtor dies, the B.R.O begins eating with its large beak-like mouth. B.R.O hatch from eggs and are only about the size of a pea. The continue growing until it becomes a mature adult. When an adult, they are only, on average, the size of a gulf ball. Their life expectancy is about two years.

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1 comment:

CBEMN said...

I find them fascinating...I am glad you did a bit more research on them!
Cathy