noun, Cell Biology. 1. a network of tubular membranes within the cytoplasm of the cell, occurring either with a smooth surface (smooth endoplasmic reticulum) or studded with ribosomes (rough endoplasmic reticulum) involved in the transport of materials.
The most widely distributed of all sea turtles; found in the Gulf of Alaska and south of the Bering Sea in the northeastern Pacific to Chile in the southeastern Pacific. In the Barents Sea, Newfoundland and Labrador in the North Atlantic; around Argentina and South Africa in the South Atlantic.
Most sea turtles, especially the males, almost never leave the ocean, which makes it more difficult to keep track of their population and ages. The largest and oldest known sea turtle species is the leatherback turtle, which is believed to have existed for more than 150 million years. Leatherback turtles also have a longer lifespan compared to other turtles and can live up to 100 years.