That dolphin might be a shark!

RED BANK, N.J. (AP) - September 2, 2008 But now they're putting some teeth into their appeal, warning that the stretch of the river where the dolphins are frolicking also has been home to some of the most dangerous sharks in the world.

Bob Schoelkopf of the Marine Mammal Stranding Center in Brigantine says bulls sharks have been known to swim in the section of Navesink River near the Route 35 bridge.

He and others have been concerned about a worsening pattern of harassment by boaters and people on personal watercraft getting too close to the dolphins in Navesink.

Although no one has documented the presence of a bull shark in the river in recent weeks, Schoelkopf says a recent encounter sounds like it could have involved one.

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