underwater hazards
Lurking aquatic threats
Underwater hazards are dangers present beneath the water's surface that threaten swimmers, divers, or vessels.
These include submerged rocks, strong currents, marine life, entanglement risks, and poor visibility.
Warning signs at beaches often list specific underwater hazards: Caution: underwater hazards include sharp coral and sudden drop-offs.
- sharksLarge predatory fish
- jellyfishDrifting marine stinger
- sea snakesAquatic venomous serpents
- tsunamisEarthquake-generated ocean waves
- hydrothermal ventsSubmarine volcanic water jets
rip tides · blue-ringed octopus · entanglement · fishing nets · poor visibility · oil spills · shipwrecks · hypothermia · storm surges · drowning · pipelines · suffocation · bends · cables · moray eels · disorientation · tides · stingrays
- scuba divingscuba, regulator, BCD, scuba diving, wetsuit
safety valence
underwater hazardsprotected waters
Oceanic areas with legal restrictions
navigable waters · sheltered waters · marine sanctuary · safe harbor