Mantle hyperextension

[OrionN]

When clams, especially the species that require high light, do not get the light they needed, they hyperextended their mantle to collect more photons. Here are examples of hyperextensions. the two Noae I got from a dealer did not get adequate light. Picture from the dealer show a lot of mantel extension. Once in my tank with the high light they required, the mantle looks a lot more normal, and the clams growing fairly fast, already adding a row of scuttles to their shells. The color improved and the mantle extension is much more reasonable.
Pictures from the dealer

In my tank with plenty of light

 

[bradreef]

So center should be a line like this and not open. Good to know, i just double checked mine.

 

[i cant think]

This is what makes me question if I have a Maxima, my clam is getting the right light however he has what looks to be hyper mantle extension.
I’m not the best judge with mantle extension though so I’ll let you judge it.

 

[OrionN]

Your’s looks great. Growing too so you don’t have to worry about it.