Marine biology

a reef consisting of coral consolidated into limestone

the wide part of a river where it nears the sea; fresh and salt water mix

relating to or occurring or living in or frequenting the open ocean; "oceanic islands like Bermuda"; "oceanic currents"; "oceanic birds"; "pelag…

relating to or occurring or living in or frequenting the open ocean; "oceanic islands like Bermuda"; "oceanic currents"; "oceanic birds"; "pelag…

photosynthetic or plant constituent of plankton; mainly unicellular algae

the aggregate of small plant and animal organisms that float or drift in great numbers in fresh or salt water

animal constituent of plankton; mainly small crustaceans and fish larvae

an island consisting of a circular coral reef surrounding a lagoon

a long coral reef near and parallel to the shore

a coral reef off the southern coast of Florida

microscopic unicellular marine or freshwater colonial alga having cell walls impregnated with silica

a long narrow estuary (especially in Scotland)

a coral reef off the southern coast of Florida

a coral reef off the southern coast of Florida

microscopic organisms found in plankton

unicellular algae, one of four families of Charophyte green algae

plankton that inhabit rivers