The longnose spider crab is found in a variety of coastal and estuarine habitats to approximately 50 m depth (Williams 1984). The native range of L. dubia extends from Cape Cod to southern Texas, Bahamas and Cuba. However, in the past decade the species has been reported in the Mediterranean Sea off the Tunisian coast (Enzenross & Enzenross 2000), although the exact date and vector of introduction is unknown. In Florida, L. dubia has been documented as a common inhabitant of Florida Bay (Tabb & Manning 1961), and the most prevalent spider crab in Tampa Bay (Dragovich & Kelly 1964). Both adult and juvenile L. dubia are found throughout the Indian River Lagoon. Juveniles are common in seagrass beds, and adults may inhabit more open sandy-bottom areas. Juvenile crabs can also be found attached to the cannonball jelly, Stomolophus meleagris, which occurs seasonally along the coast and throughout the India River Lagoon (Tunberg & Reed 2004).
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