'Sea mat' definitions:

Definition of 'sea mat'

From: WordNet
noun
Sessile aquatic animal forming mossy colonies of small polyps each having a curved or circular ridge bearing tentacles; attach to stones or seaweed and reproduce by budding [syn: bryozoan, polyzoan, sea mat, sea moss, moss animal]

Definition of 'Sea mat'

From: GCIDE
  • Sea mat \Sea" mat`\ (Zool.) Any bryozoan of the genus Flustra or allied genera which form frondlike corals. [1913 Webster]