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The two dorsal fins are placed towards the back of the body, with the first originating over the rear of the pelvic fin bases. The first dorsal fin has a rounded apex and is larger than the second dorsal fin, which has a more angular shape. The pectoral and pelvic fins are moderate in size. In males, the inner margins of the pelvic fins are ...
Dorsal fin diagram with landmarks labeled. Fins allow the sharks to be able to guide and lift themselves. Most sharks have eight fins: a pair of pectoral fins, a pair of pelvic fins, two dorsal fins, an anal fin, and a caudal fin. Pectoral fins are stiff, which enables downward movement, lift, and guidance.
The body is fairly compressed from side to side and tapers towards the tail. The two dorsal fins are placed far back: the first originates over the rear of the pelvic fins while the second originates over the midpoint of the anal fin. The first dorsal is much larger than the second. The pectoral fins are large and broad. The pelvic fins are ...
This stocky, dark-colored shark grows up to 4.0 m (13.1 ft) long, with two small dorsal fins positioned far back on its body and no anal fin. It is characterized by a dense covering of thornlike dermal denticles, hence its common name.
The two similarly sized dorsal fins are placed well back on the body. The anal fin is low and positioned just in front of the caudal fin. The caudal fin has only an upper lobe, which contains a prominent ventral notch near the tip and is angled almost horizontally relative to the body. Adult epaulette sharks are beige to brownish above with ...
On the single body, there were four anticipated dorsal fins, two anterior, right and left and two posterior, right and left." Experts say animals with such a condition have a difficult time ...
The two dorsal fins are located far back on the body, and there is no anal fin. The lower lobe of the caudal fin is larger than the upper. A row of small thorns runs down the middle of the back and tail; thorns are also present on the snout and over the eyes. [4] As the shark ages, the thorns decrease in size and may disappear.
According to biologists, the dorsal fin’s size in such shallow water should reveal part of the shark’s back or a second dorsal fin — neither of which are visible.