Assertion: glass sponge | /r/HasProperty | marine
Facets:
value: exclusively
type: DEGREE
Source sentences:
text: Hexactinellida, or glass sponges, are exclusively marine and mainly restricted to hard and soft substrates in deeper waters (200 to >6000 m), although they occasionally occur in shallower, scuba-accessible, water, such as submarine caves in the Mediterranean , , or off the coast of British Columbia where they form massive structures analogous to Mesozoic sponge reefs, e.g. –.