Habitat 
Depth 
Group 
Role WHAT DO THEY LOOK LIKE?
The water-flow system characterises sponges: water passes from inlet pores through chambers to outlet openings. Flagellated cells maintain the flow. Shape and skeletal organisation vary considerably, and microscopic characters are often essential for identification.WHERE DO THEY LIVE?
Marine sponges occupy diverse habitats and are not restricted to the Red Sea. Reef forms use surfaces among other attached organisms. This group guide does not turn one local observation into a universal geographic or depth range.WHAT DO THEY EAT?
Water flow brings resources that cells can capture, including bacteria and organic particles. Dissolved-material use and microbial symbioses differ between species. These mechanisms contribute to reef material exchange but cannot be read directly from an image.GO FURTHER WITH AMIGANSEAU
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