No picture ? Not easy to tell , most of the cartilaginous fishes in the order Skate are flat

Plowhead Rays ?Rhinobatidae Group Fan Rays Platyrhina ?

Below is a picture of a Tang's platyrhina tangi. Platyrhina tangi ?(Townsend's yellow-dotted skate)

The body disk is nearly rhombic, with the muzzle end and left and right angles bluntly rounded. The teeth are small and numerous, arranged in a pave stone-like pattern. The eyes are superior, the back of the fish is brown or gray-brown, and the ventral surface is light white. The posterior margin of the ventral fin is not notched. Tail slender, with skin folds on both sides. Dorsal fins 2, small, well behind the ventral fin. Caudal fin well developed, upper and lower lobes homomorphic. Decent roughness, dorsal surface with a row of central knob-like projections. Body length up to 68 centimeters.

Ray family Dasyatidae ? Narrow-tailed stingrays of the genus ? Himantura cartilaginous fish ?

Below is a picture of the ? Pacific narrow-tailed stingray ? Himantura pacifica ?

The body disk is rounded and smoothly bulged in the middle, unlike rays, which have a distinct bulge in the middle. Stingrays have a body disk that is wider than it is long, an elongated tail, no caudal fin, and generally a venomous spine on the tail, and there are species that live in the sea as well as in freshwater. The pectoral fins wrap directly around the front of the head. They are benthic, have tiny teeth, feed on small invertebrate fish, and often lurk and hunt with their bodies buried under the sand.

Electric rays (family Electromyzonidae) ?Hypnidae Australian sleeping electric rays of the genus Hypnos cartilaginous fish ?

Below, the monofinned Australian sleeping electric ray Hypnos monopterygius

The body is flat and the body disk ? broad and fan-like, with a broadly flattened, posteriorly slender tail. Body with a pair of honeycomb hair appliances on either side of the ventral surface of the body. The muzzle is bluntly rounded. Eyes small, mouth small. Upper and lower collars with fine pointed teeth in a pave-stone arrangement. Spouting pores larger than eyes, ovoid, situated behind eyes. Gill pores small, 5, located in the generator, body without slip, 2 dorsal fins, located on the upper part of the tail. No anal fins, pectoral fins narrow. Ventral fin slightly broad, fin feet flat, tubular, caudal fin broom-shaped. Dorsal gray-brown, ventral white.

Ray family Myliobatidae ? Cartilaginous fishes ? (under 7 genera ? About 41 species)

Rays genus ?Myliobatis ? Fish

Aetomylaeus, a genus of spineless rays

Pteromylaeus, a genus of prehensile rays

Bullfin rays, a genus of rays called Rhinoptera ? Fish

Below is a picture of ? Aetobatus narinari ?

Body plate about twice as wide as body plate length; anterior margin slightly convex, posterior margin concave. Antennae short, arcuate, bluntly rounded anteriorly, sloping downward toward front of head, protruding on ventral surface; antennae about 1/8-1/7? of disc length (shorter in juveniles). Eyes round, lateral, slightly protruding; eye diameter about equal to diameter of water jet. Water-jet aperture dorsal, situated behind eye. Mouth medium-large, flat and transverse, mouth width smaller than length of anterior muzzle. Fin feet stoutly flattened, posterior end conical. Dorsal fin 1, small; starting point slightly smaller than its basal length from end of ventral fin, posterior end much more anterior than posterior end of ventral fin. Tail elongate, about 4 times length of body plate; caudal spine 1. Body smooth, dorsally dark brown or russet, with white or blue spots on pectoral, ventral, and dorsal fins, pure brown without spots on muzzle and head; ventral surface white, posterior margins of pectoral and ventral fins dark brown; caudal fin with dark brown and light-colored stripes.

It is found in the tropical and warm-temperate Indian, Pacific and Atlantic Oceans. Mainly feeds on molluscan shellfish, harmful to shellfish farming, also eats fish, shrimp, worms, etc.; digs up shellfish in sand and mud with mandibular plate-like teeth, and uses paving-stone-like plate teeth to grind shells, possibly separating shells from meat by the papillae on the floor of the mouth. The caudal spines have poison glands.