Your request was porpose which is probably a typo from porpoise.
porpose -
Traditional English :: porpoise
porpose - n. any of various small toothed whales of the family Phocaenidae, esp. of the genus Phocaena, with a low triangular dorsal fin and a blunt rounded snout. [ME porpays etc. f. OF po(u)rpois etc. ult. f. L porcus pig + piscis fish]