Ichthybotus mayfly nymphs have delicate slender bodies, feather-like gills, fringed caudal filaments (“tails”) and tusk-like mandibles extending in front of the head.
Ichthybotus larvae burrow into the gravelly beds of streams with cool and well aerated water.
They are thought to be “collector-gatherers”, feeding on organic matter trapped in the streambed.
The presence of Ichthybotus suggests good habitat and water quality conditions, especially if other mayfly or stonefly groups are abundant. Ichthybotus has tolerance values of 8 (hard bottom sites) and 9.2 (soft bottom sites).