Nephropoidea is a superfamily of decapod crustaceans. It contains the true lobsters in the Nephropidae (including the rare thaumastochelid lobsters), and three fossil families: Chilenophoberidae, Protastacidae and Stenochiridae. Their closest relatives are the reef lobsters.

Nephropoidea. Retrieved May, 08 2021, from en.wikipedia.org/wiki/Nephropoidea.

Lobsters are a family (Nephropidae, sometimes also Homeridae) of large marine crustaceans.

Lobsters have long bodies with muscular tails, and live in crevices or burrows on the sea floor. Three of their five pairs of legs have claws, including the first pair, which are usually much larger than the others. Highly prized as seafood, lobsters are economically important, and are often one of the most profitable commodities in coastal areas they populate. Commercially important species include two species of Homarus (which looks more like the stereotypical lobster) from the northern Atlantic Ocean, and scampi (which looks more like a shrimp, or a "mini lobster") — the Northern Hemisphere genus Nephrops and the Southern Hemisphere genus Metanephrops.

Nephropidae. Retrieved May, 08 2021, from en.wikipedia.org/wiki/Lobster.

The American lobster (Homarus americanus) is a species of lobster found on the Atlantic coast of North America, chiefly from Labrador to New Jersey. It is also known as Atlantic lobster, Canadian lobster, true lobster, northern lobster, Canadian Reds, or Maine lobster. It can reach a body length of 64 cm (25 in), and a mass of over 20 kilograms (44 lb), making it not only the heaviest crustacean in the world, but also the heaviest of all living arthropod species. Its closest relative is the European lobster Homarus gammarus, which can be distinguished by its coloration and the lack of spines on the underside of the rostrum. American lobsters are usually bluish green to brown with red spines, but several color variations have been observed.

Homarus americanus. Retrieved May, 08 2021, from en.wikipedia.org/wiki/American_lobster.