I call this undescribed species of Trinchesia the rasta nudi because it has a wild set of dreadlocks. It can be tiny and notoriously difficult to spot. If you manage to find one you'll never forget it! I've been spotting them in the 10-14 metre range.
Sorry if you were looking for a nude blog - this is not that kind of photo stream. Nudibranchs and sea slugs are awesome, if you don't think so then you've come to the wrong place. This is a catalogue of cool underwater sea slug sightings from New Zealand. I hope you enjoy it.
PS. This is no place for wreck heads and cave divers, unless you have nice things to say about nudibranchs. :-)
PPS. What cool nudibranch have you spotted? Email me and I might be able to include it in this NZ nudibranch catalogue.