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Guitarfish have a body form intermediate between those of sharks and rays. The tail has a typical shark-like form, but in many species, the head has a triangular, or guitar -like shape, rather than the disc-shape formed by fusion with the pectoral fins found in other rays.
The thresher sharks have an extreme example of this tail in which the upper lobe has evolved into a weapon for stunning prey. Bottom-dwelling sharks such as catsharks and carpet sharks have tails with long upper lobes and virtually no lower lobe. The upper lobe is held at a very low angle, which sacrifices speed for maneuverability.
Most batoids have a flat, disk-like body, with the exception of the guitarfishes and sawfishes, while most sharks have a spindle-shaped body. Many species of batoid have developed their pectoral fins into broad flat wing-like appendages. The anal fin is absent. The eyes and spiracles are located on top of the head.
And now, a new study says sharks have personalities as well. Yes, sharks. Researchers at the Marine Biological Association of the UK and the University of Exeter studied ten small groups of cat sharks
The shovelnose is considered to be a primitively developed ray, with many features of both sharks and rays. The shovelnose guitarfish was first considered to be a shark because of its dorsal fins' shape. Fossils of P. productus ancestors have been recovered, dating back over 100 million years. [5]
For sharks looking up from the waters’ murky depths, it can be hard to tell what humans are. On the backs of surfboards, surfers appear like seals. In confusion and hunger, the sharks may lunge ...
Rhina ancylostoma, also known as the bowmouth guitarfish, shark ray or mud skate, is a species of ray and a member of the family Rhinidae.Its evolutionary affinities are not fully resolved, though it may be related to true guitarfishes and skates.
Enter: anal fingering, which involves using a finger (or two or five) to penetrate, thrust into, or apply pressure to the anus for the sake of pleasure. According to certified sex educator Alicia ...