Common names: roundray (English), raya-redonda (Espanol)
 
Urotrygon munda Gill, 1863

Munda roundray,     Spiny roundray,     Shortfin roundray


Disc rounded, length about equal to width; pectorals continuous around head; snout short, weakly pointed; front margins of disc nearly straight to convex; eyes small but larger than spiracles (diameter ~ ½ width between eyes); width of mouth 2.17x distance from tip of snout; teeth conic and sharp in male, sharp or blunter and pavement-like in female; nostrils directly in front of angles of mouth, with broad, slightly fringed flaps; tail slender, slightly to distinctly longer than disc; tail fin a short, elongate oval, upper and lower lobes not confluent, length of top lobe of tail fin ~ 13% of SL; tail with 1 large spine (may be longer than snout) inserted before middle of tail, reaching to start of top tail-fin lobe; relatively large, strong, recurved denticles with star-like bases densely covering entire disc and tail; 1-2 scattered rows of 18-32 recurved spines along mid-back from mid-disc to tail spine.



Uniform light brown to yellowish brown above, tail with faint dusky edges; white below.

Size: 40 cm (24 cm wide).

Habitat: coastal on soft bottoms.

Depth: 4-51 m.

The Pacific coast of lower Baja and the  Gulf of California to Peru.