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The smallest species is the mangrove horseshoe crab (C. rotundicauda) and the largest is the tri-spine horseshoe crab (T. tridentatus). [ 44 ] On average, males of C. rotundicauda are about 30 centimeters (12 inches) long, including a telson that is about 15 cm (6 in), and a carapace about 15 cm (6 in) wide. [ 45 ]
The Atlantic horseshoe crab (Limulus polyphemus), also known as the American horseshoe crab, ... averaging about 3 ⁄ 4 the size of Florida horseshoe crabs. ...
The tri-spine horseshoe crab is the largest of the living horseshoe crab species. [8] Like the other species, females grow larger than males. The largest females of the tri-spine horseshoe crab can be as much as 79.5 cm (31.3 in) long, including their tail. [9]
Tachypleus gigas inhabits seagrass meadows, [16] sandy and muddy shores [10] at depths to 40 m (130 ft); [2] it is the only horseshoe crab to have been observed swimming at the surface of the ocean. [17] It occurs in both marine and brackish waters in salinities down to 15 PSU, but their eggs only hatch above 20 PSU. [15]
With fewer horseshoe crab eggs on beaches, bird species like the endangered red knot populations have declined by 84% since the 1980s.
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The mangrove horseshoe crab is the smallest of the four living species of horseshoe crabs. [5] Like the other species, females grow larger than males. On average in Peninsular Malaysia , females are about 30.5–31.5 cm (12.0–12.4 in) long, including a tail that is about 16.5–19 cm (6.5–7.5 in), and their carapace (prosoma) is about 16 ...
The U.S. Fish and Wildlife Service issued a ruling on Monday that calls for the end of horseshoe crab harvesting in Cape Romain National Wildlife Refuge in South Carolina from March 15 to July 15.