Showing posts with label Huge Marine Animals. Show all posts
Showing posts with label Huge Marine Animals. Show all posts

Thursday, January 29, 2009

Manta Rays

Manta rays are the largest member of the ray family, growing up to 25 feet across. While most fish swim, rays fly gracefully through the water by flapping the edges of their fins like wings. Rays are actually relatives of sharks.

Manta rays are a favorite among divers because they are so large and beautiful, but also very gentle. They are said to often become curious about divers and interact with them. They have the largest brain-to-body ratio of any of the shark family. They are also sometimes found in groups or even large schools.

Manta rays are sometimes referred to as devil rays because of the hornlike projections around their mouths. These are actually used to funnel food into their gaping mouths. They feed exclusively on plankton, which they scoop into their mouths as they glide along the currents. Manta rays swim slowly, often doing loops and dives as they seek out plankton.

With their huge wingspan, one often wonders if they could fly. In some ways, they do. Rays have been observed leaping completely out of the water for short periods of time. Naturally gravity takes its toll but they get some considerable air time before plunging back under the waves.

If you want to see a giant manta ray in person, you can find one swimming along with 3 whale sharks in the Georgia Aquarium. I got to watch this graceful giant up close on my recent visit there.

Tuesday, August 26, 2008

Whale Shark


Whale Sharks are the biggest fish in the world. Blue whales are far bigger, but they are air breathing marine mammals. Whale sharks can grow up to 40 feet long and weigh up to 15 tons. Strangely enough, they are one of only 3 species of sharks in the ocean that are not harmful to humans. In fact they are often photographed swimming peacefully with divers.

These gentle giants do not have the rows of razor sharp teeth fitted in most of their relatives. Instead of prowling constantly in search of blood, they casually glide through the ocean with their huge mouths open wide. They are filter feeders. This means they strain out microscopic plankton from the ocean around them as their food. They are another example of one of the biggest animals in the ocean feeding on some of the smallest.