What is "schelly"

Gwiniad \Gwin"i*ad\ (gw[i^]n"[i^]*[a^]d), n. [W. gwyniad a whiting, the name of various fishes, fr. gwyn white.] (Zo["o]l.) A fish ( Coregonus ferus) of North Wales and Northern Europe, allied to the lake whitefish; -- called also powan, and schelly. [Written also gwyniad, guiniad, gurniad.]

n. (context UK dialect English) A fish, the powan.

The schelly (Coregonus stigmaticus) is a freshwater fish of the salmon family, endemic to four lakes in the Lake District, England. Alternatively it is considered either as a species or a subspecies of the widespread Eurasian whitefish species Coregonus lavaretus. It is present in Brothers Water, Haweswater, Red Tarn and Ullswater, and the population seems stable in all of these except for Haweswater where it seems to be declining. The main threats it faces are seen to be water abstraction and cormorants, and the fish-eating birds are being culled from Haweswater. The International Union for Conservation of Nature has rated the conservation status of this fish as " endangered".