Tiny Baetis mayflies are perhaps the most commonly encountered and imitated by anglers on all American trout streams due to their great abundance, widespread distribution, and trout-friendly emergence habits.
Canine: A heavily chitinized spine arising from the mandible or maxilla, often being the main or largest "tooth" at the tip of the structure. Often used in reference to mayfly or stonefly nymphs.
This other word references the same concept: canines.