Fan-tailed a. : Having an expanded, or fan-shaped, tail; as, the fan-tailed pigeon.

Example:
I have 3 fan tailed goldfish. Is it bad if they rest on the bottom of the tank without moving?

Taxonomy
Fan-tailed Raven, species, free encyclopedia, Corvus rhipidurus, Birds, search, wings, ravens, plumage, tree, least concern, passerine bird, Eastern Africa, human food, species nests, Kingdom, Phylum, Genus.

Defination from the web:
Fan-tailed Raven (Corvus rhipidurus) is a passerine bird of the crow family native to Eastern Africa and the Arabian Peninsula. ... The Fan-tailed Raven is completely black including bill, legs and feet and the plumage has a purplish-blue gloss in good light. Worn plumage is ...