Ice fishing – A specialized form of fishing through holes cut in the ice of frozen-over waters.
Impact shield – A plastic, conical, bait retaining device that protects the bait during the cast.
Inshore – The region where waves are transformed by interaction with the sea bed.
Invertebrate – A creature that has no backbone, for instance a crab, octopus or a worm.
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 are generally worm shaped.