ID please

[cooksalot]

first of all, sorry the picture isn't clearer. i noticed this on my LR the other day (it's the blue thing in the center of the pic), and today i noticed it opens and closes. it kind of reminds me or a venus fly trap leaf the way it opens and closes. any ideas on what it is?

 

[Deanos]

Looks like a bivalve, after closer inspection.

 

[cooksalot]

Looks like a bivalve, after closer inspection.

thanks..it does look like some of the pics on the link you sent. i wonder if it will it just stay put. that website said it's a filter feeder, but will it find enough to eat while i'm cycling?

 

[tosiek]

all mine survived. Read somewhere that they help reduce nitrates. Dunno if it was confirmed.

 

[cooksalot]

all mine survived. Read somewhere that they help reduce nitrates. Dunno if it was confirmed.

here's hoping as mine are staying steady at 10.

 

[clamcrazy]

looks like a mussel to me.

 

[scarf_ace1981]

nice hitchiker.