What type of white hard thing grows on lobster

Biology Asked by 001001 on September 25, 2020

I have no idea how to explain it. It looks like mini white volcanoes growing on a lobster shell. Is it bacteria or parasite?

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One Answer

These are barnacles, which are interestingly related to lobsters. See the image for comparision (from here):

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They have a mobile larval stadium, but once they mature, they attach to a hard surface. They can be found on ships, surfaces in harbours, on whales and obviously on lobster shells. See here and here for some more details.

Correct answer by Chris on September 25, 2020

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