Puffing pig

(Zool.) the common porpoise.

See also: Puffing

References in classic literature ?
"But we saw him just the same, a-snorting for shore like a puffing pig."
Harbour porpoises are sometimes called the puffing pig as the creatures can be heard making puffing noises from the shoreline as they take a breath on the surface.
Sometimes called the 'puffing pig,' you can hear porpoises puffing from the shore, as they steal a breath at the surface of the sea.
but it also records the alarming number of dead "puffing pigs" washed up on our beaches.