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.
The Treaty of Paris was a formal agreement between America and Great Britain, signed on September 3, 1783. The signed agreement recognized American independence, established borders for the new nation, and formally ended the Revolutionary War.he ten articles of the Treaty of Paris defined the agreement of peace between America and Great Britain. It was a most important document in history, because it was a formal declaration of peace, ending the Revolutionary War, and ending the struggle for Americaâs freedom from the British.