The Bottom of the Sea

action algæ animals apparatus appear Atlantic Ocean Azores basin become beneath body bottom calcareous Cape Agulhas cause channel coasts colour continually coral reefs covered creatures crust débris deep delta deposit depth descend distance diver earth earthquake elevation embouchure eruption existence extended fact feet fish fishery floating fresh-water globe gradually greater Gulf Gulf Stream height hydra Hydrozoa immense inhabitants interior island Isles land leagues less light living marine currents marine plants mass matter Mediterranean miles molluscs monster mountains movement nature neighbourhood Newfoundland observed ocean phenomena phenomenon phosphorescent polypi quantity regions remarkable rise river rocks sailor salt sand sea-bottom sea-water shark shells ship shore Simon's Town sinking soil sometimes species spermaceti sponge stones Straits Straits of Dover Straits of Gibraltar submarine submarine volcanoes surface temperature tentaculæ tint tion tunny valve vast vegetation vessel volcano waves whale yards