The Collaborative International Dictionary
Floe rat
Floe \Floe\ (fl[=o]), n. [Cf. Dan. flag af iis, iisflage, Sw. flaga, flake, isflaga, isflake. See Flag a flat stone.] A low, flat mass of floating ice.
Floe rat (Zo["o]l.), a seal ( Phoca f[oe]tida).
Wiktionary
floe rat
n. (context archaic English) A seal (the animal).