SEA Undersea

There are a few nudibranchs I've encountered but haven't been able to identify.

Unknown #6

Maybe chromodoris?

Unknown #5

Maybe glossodoris?

Unknown #4

Likely a chromodoris or maybe nembrotha

Unknown #3

Maybe really a flatworm?

Unknown #2

This looks like a glossodoris or maybe chromodoris but I can't find a good match.

Unknown #1

This might be a Pteraeolidia ianthina, but it's enough unlike the other photos of that critter that I'm not sure.