The shark is only the second in history to be observed regrowing a dorsal fin. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works.

However, 332 days after the wounded shark was photographed, divers spotted the same shark, identifiable by the NOAA dart tag which remained attached to the base of its dorsal fin. There was no ...

When placing the GPS tags, I also place a second tag beneath each shark’s dorsal fin that displays a unique ID number, so I was able to confirm the injured shark was one from my study, #409834.

When placing the GPS tags, I also place a second tag beneath each shark's dorsal fin that displays a unique ID number, so I was able to confirm the injured shark was one from my study, #409834.

The first step involves catching the shark. Collatos explains that she start by tossing out a piece of bait with a fishing ...

The fin of a great white shark, on the other hand, remains still and rigid as it moves. “ [The] dorsal often appears to lean and flex as the shark swims on the surface,” Chisholm explained.

Identifying a species on the basis of a dorsal fin sighting is a challenge even for professional marine biologists. However, photos and better yet, video, are still invaluable.

Local News Someone sees a dorsal fin. Does that mean lifeguards will close the beach? A Plymouth beach closed after a shark sighting in 2014. Barry Chin/The Boston Globe ...

Here’s how to tell the difference The dorsal fins of some less-threatening sea creatures are often mistaken for sharks, experts say. By Steve Annear Globe Staff,Updated July 7, 2020, 1:26 p.m. 31 ...

Warnie is not the only killer whale missing a dorsal fin. A female named Lucky is a well-known member of the orca population in Bremer Canyon and lives without her dorsal fin.