The one on Midsummer's Eve had yellow slits for eyes, a puckered nose, and a face like a dried cantaloupe. The head was bald and scabrous and was fringed with web like hair. The sinuous arms were gangly, the hands were long and leathery, and tipped with hooked claws. Ribs, collarbones, and pelvis jutted hideously. Spidery networks of veins bulged against maroon flesh. In book five it is mentioned by a river troll that goblins have very low intelligence.
Slaggo and Voorsh
Both short, bony, and greenish, with beady eyes and batwing ears, these two have managed the Fablehaven dungeon for centuries. They are scrawny, servile creatures who live to carry out orders from their superiors. They enjoy dwelling in the darkness, supervising their dismal domain.