Montagu's Crab

Overview

Montagu's Crab (Xantho hydrophilus) is a small, robust crustacean belonging to the family Xanthidae. Often found in rocky coastal environments, this species is recognized by its thick, yellowish-brown carapace and powerful, dark-tipped claws.

Appearance

The carapace of this crab is oval-shaped, broader than it is long, and features a smooth, slightly granular surface with shallow furrows. It typically displays a yellowish-brown coloration, sometimes with reddish patches or darker mottling. A key identifying feature is the presence of five blunt, obtuse teeth along the antero-lateral margins. Unlike its close relative, the hairy crab (Xantho pilipes), the walking legs of Montagu's Crab are relatively smooth and lack dense fringes of hair.

Distribution & habitat

This species is widely distributed throughout the Northeast Atlantic, ranging from the British Isles and the North Sea down to West Africa, and is also present in the Mediterranean. It is primarily a bottom-dweller, commonly found in the lower intertidal zone and sublittoral waters. It prefers sheltered areas, frequently hiding under stones, in rock crevices, or within rocky cavities on sandy and stony beaches.

Biology & behavior

Montagu's Crab is a nocturnal omnivore, often emerging from its hiding spots at night to forage. It is considered a hardy species and has been noted as an indicator of climate change, as its range has been observed expanding into previously cooler waters. Reproduction is seasonal, with females carrying eggs during the spring and summer months before releasing planktonic larvae.