The Dorsal Fin

NBC Washington is reporting that an 8′ (2.4m) long bull shark was caught on August 31 in the Potomac River. According to the report, Willy Dean was fishing in Maryland’s St. Mary’s County in hopes of netting cownose rays for a biologist from Solomons Island, MD. Dean inadvertently netted the bull shark, which put up “quite a fight,” according to the fisherman. Dean says he will likely have the shark’s head “mounted” and is currently keeping the carcass in his freezer, according to the report.

Photos of the shark carcass are posted at NBC Washington.

YouTube user yleelawman recently posted the above video of what is described as a great white shark filmed in Stellwagen Bank during a whale watching tour. White sharks have been spotted fairly regularly in the waters off of Massachusetts, during this time of year, when the species is known to commonly migrate to northern waters of the Atlantic.

Update: A reader has commented that the dorsal fin seen in the video seems more characteristic of a basking shark than a white shark. After watching the video again, I’m inclined to agree. Basking sharks are also not uncommon in Massachusetts waters. Just last month a basking shark washed ashore on a Massachusetts beach after being filmed earlier swimming very close to shore.

If any shark experts out there would like to weigh in on the species identification, please let us know in the comments section. Thanks!

Over the weekend, I had the opportunity to dive with some sand tiger sharks off the North Carolina coast. Unfortunately, the juvenile sand tiger in the video above had apparently been hooked on what appears to be a fisherman’s bottom rig. The young shark was swimming around inside the hull of the USS Indra. The shark appeared to have a treble hook in its lower jaw with a lead sinker dangling from it.

The sand tiger shark (Carcharias taurus) is a protected species in U.S. waters. However, due to the unpredictable nature of fishing, sand tigers can be accidentally hooked by fisherman. It is unclear whether this particular shark was hooked accidentally and broke the line, or the line was simply cut.

A diver had told us he attempted to remove the hook from the shark on a previous dive. He said he had “wrestled” with the shark for quite some time during the attempt, but his efforts proved unsuccessful.

According to a WPTV.com report a 9′ (2.75 m) female scalloped hammerhead was caught by fisherman off-shore and then left dead on the docks of the Sailfish Marina in Palm Beach, Florida. The abandoned catch has stirred up some controversy. A WPBF.com report on the event quotes Jim Abernathy as saying that the catch was illegal based on Florida law. According to Abernathy, any fish that is not intended to be eaten must be immediately released under the state law.

Despite being listed as an endangered species on the IUCN Redlist, the scalloped hammerhead (Sphyrna lewini) is not a protected species in Florida waters.

A great white shark predation event on a seal was captured on video by a Massachusetts’ family. According to WPRI, the event occurred 20 yards from shore, off the coast of Provincetown last week. Estimates put the white shark at approximately 15′ (4.5m) in length according to the report.

While the WPRI video report refers to the feeding event as “vicious” and “violent,” it is also noted that it is part of “the cycle of life.” Seals often serve as a natural food source for larger great white sharks.