Oceans
Sea
Convection currents
Divergent plate boundary
Convergent plate boundary
Transform plate boundary
Hot Spot
Guyot
Abyssal Plain
Continental shelf
Continental slope
Submarine canyon
Abyssal hill
Seamount
Oceanic trench
Thermocline
Salinity
Thermohaline circulation
La Niña
El Niño
Overfishing
Biotic
Abiotic
Eutrophication
Red Tides
Currents
Exclusive Economic Zone
Territorial waters
Polyp
Fringing reef
Barrier reef
Atoll
Mangroves
Drift nets
Bottom drag nets
Dynamite fishing
Cyanide fishing