UNDERWATER CSs of ctenophores (beroe), drifting near surface at floe edge (1:42). UNDERWATER TRAVELLING SHOTS of algae growing in pores underneath edge (2:57). UNDERWATER CSs of ctenophores (beroe), various species, drifting near surface at floe edge (6:00). CUs of algae growing in pores underneath floe edge (0:56). CSs of ctenophores (beroe), drifting near surface at floe edge (1:12).