Saturday, July 10, 2010

Red sea crown jellyfish....


Sea Nettle


Portuguese Man-of-war


Upside-down jelly fish


Moon jelly


Lion;s Mane


Close relatives

Rays and skates are closely related, and similiar in shape. They both have
flat bodies and broad pectoral fins. The main difference between these two groups of fish is their proportions. Skates' discs (heads and body combined) are longer than they are wide, and rays' discs are wider than they are long. How do we know?

Scientists categorise rays into families based on certain characteristics.

These include the number of dorsal and tail fins they have, and the shape of their discs.

Sometimes scientists disagree on which families a ray should be placed in, or which charateristics should be used to categorise them.

RAY FACTS

Electric Rays can produce an electric charge up to 220 volts to stun or kill the prey, or to protect

from predators....