Main types of hooks used by longliners.

Detail of the three different hooks used for the Spanish surface

Circle hook - Wikipedia

Fishing Gear Types 101: Longlines & Hook and Line — Monterey Bay

Frontiers Mitigating effects on target and by-catch species

Fishing Vessel Types

PDF) Hooks used in longline fishing

Longlining - an overview

Fish Behavior in relation to Longlines.pptx

Longline Fisheries - BirdLife South Africa