Nudibranchs are otherwise known as sea slugs. Amazing critters really. Carnivorous, hermaphroditic, soft bodied marine snail. They have head tentacles for touch, taste and smell. Branchial plumes on thier backs for respiration. Sub adults can be seen frequently undulating high in the water column. Frequent visitors of the illumination around the boat when fishing the reefs at night. Here's a couple shots: Spanish Shawl
spanishshawl.jpg
Chamberlaini
chamberlaini.jpgand Nembrotha
nembrotha.jpg
The latter most resembles the ones we encountered on the hook