Halifax-based scuba diver Lloyd Bond says in the last three years he's seen increasing numbers of butterfly fish, seahorses, cornet fish, trigger fish, puffer fish, and many other species not native to Canadian waters.

A total of 161 great white sharks have been spotted off the coast of Cape Cod, Massachusetts, since June. Experts say attacks on people are unlikely as the sharks are looking for seals.

Julie Dimperio Holowach, a recently retired fashion executive from New York City, was swimming near Bailey Island on Monday afternoon when she was attacked.