Black Nudibranch ID help

[WADiverBob]

I am from WA. I dive at Breakwater at Monterey Bay in Aug. I saw a big black nudibranch.I looked some id. books but not there. Anyone know what this is ? please.

Thanks,
WADiverBob

 

[jlyle]

It's a pleurobranch, don't know which species...so, Pleurobranchus sp.

 

[WADiverBob]

Jlyle...

Thanks for help ID. I interest about Pleurobranchus. I will find what name.

WADiverBob

 

[opisthobranch]

I am from WA. I dive at Breakwater at Monterey Bay in Aug. I saw a big black nudibranch.I looked some id. books but not there. Anyone know what this is ? please.

Thanks,
WADiverBob

It's a Giant Keyhole Limpet; Megathura crenulata. Note the hole on the top of the animal.

Clinton