From this angle, it seems as if these red tube sponges are topped with seasonal greenery. Closer exa
From this angle, it seems as if these red tube sponges are topped with seasonal greenery. Closer examination reveals it’s actually a black crinoid, growing from the reef just above, and silhouetted by morning light filtering down. (Photograph: Walt Stearns) -- source link
#coral reef#crinoid#scuba diving#snorkeling#underwater