Assertion: siliceous sponge | /r/AtLocation | deep water
Facets:
Source sentences:
text: The siliceous glass sponges of the class Hexactinellida are found in deep water and include such spectacular forms as the glass rope sponge (Hyalonema) and the Venus’s flower basket (Euplectella), whose beautiful lattice-like skeleton was highly prized as a collector’s item in Victorian times.