Entry: otterish (adj.)
In context: "Hal is sleek, sort of radiantly dark, almost otterish, only slightly tall, eyes blue but darkly so, and unburnable even w/o sunscreen, his untanned feet the color of weak tea, his nose ever unpeeling but slightly shiny."
Definition: Not surprisingly a neologism, but pretty obviously an adjective describe an otter-like manner or appearance.
Here are some interesting -ISH words valid in Scrabble:
SNOOT score: 1
Source: Oxford English Dictionary