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juliersavage

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Can anyone identify this on the side of a frog spawn?
Thank you!

20240409_171559.jpg
 
I haven't seen it move. I just noticed it. Looks like it has teeth haha! I could use a sea hare...
if it hasn't moved at all it could rule out the abalone. bivalves/mollusks i believe are stationary/don't move at all
 
I'm fairly confident that's a bivalve of some variety, but I can't say which kind from the pic (the mouth where the "teeth" are is quite unique from what I can see though) - an oyster or relative would be my first thought.

That said, an abalone (Haliotis species) would have a distinctive row of holes along the top of the shell, so you can see if you see that anywhere, OP.

Regardless, this isn't something harmful, so I'd say to keep it and enjoy.
bivalves/mollusks
Just for clarification here, most (but not all) bivalves are sessile as adults (so they don't move) - but mollusk is a taxonomic step up from bivalves and includes things like octopuses and snails and such; so many/most mollusks do move as adults.
 
That looks like something from the Godzilla film genre.

Sessile filter feeder?
 
Thanks everyone for taking a look. I used Google Lens to help try and identify or link me to related info but was coming up with nothing. It does most resemble the bivalve. Interesting...
 

IF YOU HAD TO TAKE A REEFING EXAM, WOULD YOU PASS?

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