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| Common names: roundray (English), raya-redonda (Espanol) |
Urotrygon chilensis (Günther, 1872)
Blotched roundray, Chilean roundray, Thorny roundray
Disc a wide oval; pectorals continuous around head; eyes larger than 1/3 distance between them; tail slender, its length greater than disc length; 1 large venomous spine on tail; tail fin slender (height ~ 4.1% of TL); denticles scattered (sparsely or densely) over entire disc, patches between eyes, sides below eyes, along back and top and sides of tail; thorns and denticles with different shapes - thorns are keel-like with oval bases, denticles curved; 1 irregular row of thorns on midback and tail (sometimes midback only, or on shoulder and tail only.
Upper surface grey, grey-brown or tan, with scattered irregular dark grey to blackish spots; lower surface yellowish-white with brown border.
Size: 42 cm (26 cm wide).
Habitat: shallow coastal sandy bottoms.
Depth: 1-60 m.
Southern Baja and the Gulf of California to Chile.