Gillnetting is a passive fishing technique where a net is set in the water and fish become entangled in the mesh as they swim through it.

Anadromous fish are those that migrate from saltwater to freshwater to spawn.

Electric eels are not actually fish, but are a type of knifefish found in South America. They are capable of generating powerful electric shocks.

Catch and release is a practice where anglers release fish back into the water after they have been caught, typically to promote conservation and sustainable fishing.

Overfishing, pollution, and climate change are all major threats to marine fisheries, as they can lead to declines in fish populations and disruptions to marine ecosystems.

Marine protected areas are designated areas of the ocean where fishing and other human activities are restricted or prohibited in order to protect marine habitats and biodiversity.

Using selective fishing gear, such as hook-and-line or traps, can help to reduce bycatch and minimize the impact on non-target species.

Aquaculture is the practice of raising fish and other aquatic organisms in captivity, typically for food production.

Mariculture is a type of aquaculture that involves raising fish and other aquatic organisms in enclosed pens or cages in the ocean.

The maximum sustainable yield (MSY) is the largest amount of fish that can be caught from a fishery without depleting the stock over the long term.

Trawling is a type of fishing gear that is used to catch fish by dragging a net along the bottom of the ocean.

Artificial reefing is the practice of using artificial reefs to attract fish and create habitat.

Longlining is a type of fishing gear that is used to catch fish by setting a line with multiple hooks.

Catadromous fish are those that migrate from freshwater to saltwater to spawn.