Bobtail squid burying itself in sand at Seraya in Bali, Indonesia. (Matthew Oldfield)
The little fins seem to be waving furiously as this chap was caught mid-burrow. SO CUTE. I think I might have to set up my home aquarium just to breed these guys.
If you want to know whether a bobtail squid is a true squid, here's my previous taxonomic assessment.