Crabs of the British Isles (29,193 t), various swimming crabs (3,180 t), the spider crab "Maja squinado" (1,565 t), the shore crab or green crab "Carcinus maenas" (553 t) and the velvet crab "Necora puber" (193 t). Around 77% of the catch is landed in the United Kingdom, 19% in Ireland, 4% in the Channel Islands, and 1% in the Isle of Man. 62 species have been directly observed in the waters of the British Isles: Three deep-water species have also been recorded near the British Isles, and are likely to occur in the area. These are: Crabs of the British Isles Around 65 species
Invasions of the British Isles Invasions of the British Isles Invasions of the British Isles have occurred throughout history. Various sovereign states within the territorial space that constitutes the British Isles were invaded several times; by the Romans, Germanic peoples, Vikings and Norsemen that came from Sweden, Denmark and Norway, the French and the Dutch. Before the Romans came to Britain, and with them the advent of written records of the region, the majority of Britain was Celtic. How and when these peoples arrived in the British Isles is a matter of much conjecture; see Celtic settlement of Great Britain and Ireland for more details.