Dogfish Shark Placoid Scales. Dogfish sharks are small sharks belonging to one of three families: the dogfish shark family, Squalidae; the requiem shark family, Carcharhinidae; and the cat shark family, Scyliorhinidae.he green dogfish, along with several other members of the dogfish shark family, is luminescent. Scales are small plates that form part of the skin of certain animals. They provide protection from the environment and from predators. Sharks have placoid scales, bony, spiny projections with an enamel-like covering.
Treaty: A formally concluded and ratified agreement between countries Armistice: An agreement made by opposing sides in a war to stop fighting for a certain amount of time;truce Therefore the difference between a treaty and a armistice is that a treaty is a permanent binding agreement of international law while an armistice is a formal agreement to end fighting for a period of time.
6. (Government, Politics & Diplomacy) (in Canada) a. any of the formal agreements between Indian bands and the federal government by which the Indians surrender their land rights in return for various forms of aid. b. (as modifier): treaty Indians; treaty money.