Cartilage Cartilage is a flexible but strong supportive connective tissue. Unlike bone and all other connective tissue types, cartilage is avascular, lacking blood vessels. For this reason alone, cartilage does not possess the regenerative capacity of bone or the other connective tissue types. Remember, nutrient delivery is essential for tissue repair.
The flounder is a species of flatfish that is found in the coastal waters of the northern Atlantic and Pacific Oceans. Flounder are found hiding on the ocean floor at depths from shallow coral reefs to the deepest trench on Earth.
Pretty much all over the world in/around any muddy water in generally rural areas. They are mostly found in Asia and South America, but can be found as far north as Iceland... Addition: Most leeches live in freshwater, but some species live on land and some in salt water. Mikey Ennis.