moon shell: marine gastropods having smooth rounded shells that form short spires
seasnail: any of several creeping marine gastropods with a spirally coiled shell: whelks; tritons; moon shells; neritids
swordfish: large toothless marine food fish with a long swordlike upper jaw; not completely cold-blooded i.e. they are able to warm their brains and eyes: worldwide in warm waters but feed on cold ocean floor coming to surface at night