From left, circle, J and tuna hooks, three hook shapes commonly used in

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UCEC Wide Gap in-Line Circle Hook, 50PCS High Carbon Steel Saltwater Freshwater Fishing Hooks for Tuna, Carp, Catfish, Bass, Amberjack and More, 5 Sizes - 4/0, 5/0, 6/0, 7/0, 8/0 : : Sports, Fitness & Outdoors

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Lateral view of 9/0 J-hook, 3.6 sun Japanese tuna and 18/0 circle hooks