Isome – A soft, biodegradable hook bait which is generally worked slowly on LRF tackle. The name comes from the Japanese word for sand worm and these baits or lures …
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Ichthyology – The scientific study of fish.
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Ice fishing – A specialized form of fishing through holes cut in the ice of frozen-over waters.
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IGFA – International Game Fishing Association is an American based organisation which maintains world record for fish in particular those caught on a particular breaking strain of line.
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IFSA – The governing body for sea angling in Ireland. Selects international teams for Home Internationals and CIPS events.
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Impact shield – A plastic, conical, bait retaining device that protects the bait during the cast.
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Inshore – The region where waves are transformed by interaction with the sea bed.
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Invertebrate – A creature that has no backbone, for instance a crab, octopus or a worm.