ID please (nudibranch?)

[john603]

not sure what type of nudi this is, friend just saw it in his tank and said it's several inches long...

 

[greenbean36191]

Well, it's a Tritoniid for sure, so it's a predator of cnidarians, but exactly what probably isn't known. I suspect it's probably the same species Bill Rudman has labeled as Tritoniid sp. 3.
http://www.seaslugforum.net/display.cfm?id=4629

 

[boomsticks]

Wow that's beautiful. Very nice coloration on that one I must say.