shell type thing growing on green Brain

I finally got a shot of this...had to wait until brain was withdrawn nicely.
...and I had to take it out...But here are some good shots.
It seems to get larger and open somewhat during the day...as the brain swells it seems to compensate and get taller....it has a hinge, so it seems to only open partially on one side only... they do not seem to bother one another...cannot find anything like it on the web... don't know what to look for..
reminds me of a clam or muscle...but it is clear with the black lines or opaque.
It also appears to be very thin...
Thanx folks.
Good morning to you all !!
Coffee time !!!!
LG

 

looks like an oyster shell to me the best i can tell kinda hard to make out.

 

left handed jewel box oyster

I don't know if it's a Chamidae or a psuedochamidae

 

I'm a assuming its just a hitchhiker of the passive kind...?
Not to worry about it?
thanx for the quick response...I will Google and find out more about it.
LG

 

Harmless filter feeders

 

I just wrote a 1000 word explanation of why I thought it was one thing or another, but when I posted it, 3reef told me I wasn't logged in and my post evaporated (nevermind that it says "Logged in as pagojoe" right at the top of the page). Anyway, I'll be less diplomatic and informative this time and just say, "It's probably Isognomon legumen, in the Hammer Oyster family." Most of the Chamidae have more inflated shells, typically with more sculpture, and are more rounded. It could also be one of the Spiny Oysters in the family Spondylidae, albeit one of the non-spiny ones. Compare your animal to the shells of Isognomon legumen in the link below, particularly Poppe's stock number 407170, on the tenth row:

Conchology, Inc - Search Results - ISOGNOMONIDAE

You also might want to look at the examples of Spondylus ducalis, as some of them look quite similar. These shells are much thicker than the Isognomon shells:

Conchology, Inc - Search Results - SPONDYLIDAE

As the others said, it should be a harmless filter feeder in any case, although it might be a challenge to keep it alive.

Cheers,



Don

 

Incredible likeness...I believe you are spot on my friend..Just a bit more elongated...but thats the one I'm certain.
Thank you so much for the informative link...I will save.
as for keeping it alive...it just has grown as my tank matured...seems to be very healthy and co-exist with the brain very nicely.
thanx again.
LG
k+

 

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