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Én-Dorsal fin azaz hátúszó

Day 4,907, 04:14 • Published in Hungary Hungary

• by Karlista

Dorsal fin shark
The main purpose of the dorsal fin is to stabilize the animal against rolling and to assist in sudden turns. Some species have further adapted their dorsal fins to other uses. ... For example, both the spiny dogfish and the Port Jackson shark have spines in their dorsal fins which are capable of secreting venom.