Isaea is a small genus of amphipod

Amphipoda

Amphipoda is an order of malacostracan crustaceans with no carapace and generally with laterally compressed bodies. The name amphipoda means "different-footed", and refers to the different forms of appendages, unlike isopods, where all the legs are alike. Of the 7,000 species, 5,500 are classified...

 crustacean

Crustacean

Crustaceans form a very large group of arthropods, usually treated as a subphylum, which includes such familiar animals as crabs, lobsters, crayfish, shrimp, krill and barnacles. The 50,000 described species range in size from Stygotantulus stocki at , to the Japanese spider crab with a leg span...

s that live commensally

Commensalism

In ecology, commensalism is a class of relationship between two organisms where one organism benefits but the other is neutral...

 on the mouthparts of other crustaceans.

Isaea montagui

I. montagui was named in 1830 by Henri Milne-Edwards

Henri Milne-Edwards

Henri Milne-Edwards was an eminent French zoologist.Henri Milne-Edwards was the 27th child of William Edwards, an English planter and militia colonel in Jamaica and Elisabeth Vaux, a French. He was born in Bruges, Belgium, where his parents had retired. At that time, Bruges was a part of the...

 in honour of George Montagu. It lives on the mouthparts of the spider crab Maja squinado

Maja squinado

Maja squinado is a species of migratory crab found in the north-east Atlantic and the Mediterranean Sea.-Diet:M...

, and is found from the West of Ireland

Ireland

Ireland is an island to the northwest of continental Europe. It is the third-largest island in Europe and the twentieth-largest island on Earth...

 to the Mediterranean Sea

Mediterranean Sea

The Mediterranean Sea is a sea connected to the Atlantic Ocean surrounded by the Mediterranean region and almost completely enclosed by land: on the north by Anatolia and Europe, on the south by North Africa, and on the east by the Levant...

.

Isaea elmhirsti

I. elmhirsti was named in 1909 by Alexander Patience in honour of Richard Elmhirst, who was the director at that time of the University Marine Biological Station at Millport

Millport, Isle of Cumbrae

Millport is the only town on the island of Great Cumbrae in the Firth of Clyde off the coast of North Ayrshire, Scotland. The town is four miles south from the Largs-based Caledonian MacBrayne ferry slipway....

. It lives on the mouthparts of the European lobster

European lobster

Homarus gammarus, known as the European lobster or common lobster, is a species of clawed lobster from the eastern Atlantic Ocean, Mediterranean Sea and parts of the Black Sea. It is closely related to the American lobster, H. americanus. It may grow to a length of and a mass of , and bears a...

, Homarus gammarus, and is found from Ireland to the Bay of Biscay

Bay of Biscay

The Bay of Biscay is a gulf of the northeast Atlantic Ocean located south of the Celtic Sea. It lies along the western coast of France from Brest south to the Spanish border, and the northern coast of Spain west to Cape Ortegal, and is named in English after the province of Biscay, in the Spanish...

.