Reef Aquarium Fact #27 Crocea clams can extend a thin sheet of specialized mantle...

[revhtree]

We are going to continue discussing the reef aquarium facts submitted by our members. Do you agree or disagree? What are your thoughts?

Fact #27

Crocea clams can extend a thin sheet of specialized mantle tissue out of the bottom of their bassal opening, which then dissolves the substrate underneath and around the clam via chemical means. The underside of their top mantle can also be used to produce and dissolve calcium carbonate material such as their shell, coral skeleton and limestone.



Truth or False? What else might we need to learn on this subject? Please also share any pictures that may pertain to the subject.

 

[reefkoi]

True Did you also know that some crocea have 3 holes in the mantle? The inhalent, exhalent siphon and a third in between? I've seen it and will try and get a picture of one

C

 

[thewackyreefer]

How awesome is that?! Very cool, I was not aware!

 

[skinz78]

Yes indeed this is true, they bore into the soft limestone rock structure thus the Crocea is also called the rock boring clam. Some people say that the Maxima does the same thing but this is false. When Croceas are found amongst the oceans reefs they are usually nestled in small holes created by themselves for protection. When boring into the rocks the Crocea's will break off their scutes and rub it smooth on the sides of the rocks. When we get farmed Crocea's imported to the U.S. they usually have their scutes intact still because they are farmed in large concrete vats and do not bore into the hard concrete. Some importers are trying to pass these Crocea's off as a hybrid Maxima/ Crocea just because they still have scutes.

 

[skinz78]

A few Crocea's that I have had. %