MOSS ANIMALS (BRYOZOA)
The bryozoans or “moss animals” are colonial, mainly marine, animals with only 11 British freshwater species (Mundy, 1980). One of these (Victorella pavida Saville Kent) is on the Red Data Book list and lives in brackish water; it is included with the marine species. Of the remaining 10, three are known from Cornwall. One of these Plumatella fungosa (Pallas) is widespread nationally but has been found in only two sites in the Isles of Scilly and one in Cornwall. As it can form large gelatinous colonies a few metres across, it is not easily overlooked, so can be rated locally scarce.