What could be the harm in picking up a shell or rock when you're snorkeling in the ocean? A lot, actually. According to the Natural Resources Defense Council, "picking up a rock or shell could expose the organisms or fish eggs beneath it to predators." And with coral reefs being home to 25% of the world's fish, small shifts like this can have a seismic effect if everyone does it. Leave snorkeling near coral to expert swimmers, and stay far away if you're a novice. Don't forget to opt for "reef-safe" sunscreen when swimming in the ocean, too.
ANDREWS MCMEEL SYNDICATION