Collagen is the principal constituent of the fiber-network layer of our skin. More than a third of the body's protein is collagen, and it can account for an even higher percentage in particular parts of the body. Collagen makes up 70% of our skin tissue.
Sea lice are parasites of the Caligidae family of arthropods and are among the most notorious pests affecting cultured marine fish.They have a particularly large impact upon salmonid fish production.ea lice on a salmon. (Wikimedia Commons). Sea lice are parasites of the Caligidae family of arthropods and are among the most notorious pests affecting cultured marine fish. They have a particularly large impact upon salmonid fish production.
Example Phylum: Echinodermata. The phylum Echinodermata contains those animals with a 'spiny skin.' The animals in this phylum are the sea stars, sea urchins, bristle stars, sand dollars, and sea cucumbers. Echinoderms are found in all of the world's oceans and are strictly salt-water animals.