The undersea world is on the move. is propelling fish and other ocean life into what used to be cooler waters, and researchers are scrambling to understand what effect that is having on their new neighborhoods. They are finding that the repercussions of the migration of tropical fish, in particular, are often devastating. Invading tropical species are stripping kelp forests in Japan, Australia, and the eastern Mediterranean and chowing down on sea grass in the northern Gulf of Mexico and Atlantic seaboard.
Ocean Acidification | Smithsonian Ocean Portal
And more changes are coming. Rising seas are reshaping coastlines. Natural low-oxygen zones in deep waters . Ocean acidification is making life harder for shellfish. Predicting the future is messy—especially when we barely understand the present.
Saltwater Aquariums and Real Ocean Water - YouTube
Despite their size, ocean sunfish are docile, and pose no threat to human divers. Injuries from sunfish are rare, although a slight danger exists from large sunfish leaping out of the water onto boats; in one instance, a sunfish landed on a 4-year-old boy when the fish leaped onto the boy's family's boat. Areas where they are commonly found are popular destinations for sport dives, and sunfish at some locations have reportedly become familiar with divers. The fish is more of a problem to boaters than to swimmers, as it can pose a hazard to watercraft due to its large size and weight. Collisions with sunfish are common in some parts of the world and can cause damage to the hull of a boat, or to the propellers of larger ships, as well as to the fish.
Why Fish Can Drink Salt Water And We Can't - YouTube