UNUSUAL TRAITS AND ACTIVITY
Grayling habitually hold close to the riverbed whether they are actively scanning for food, or resting. Even when rising to insects at the surface, grayling tend to hug the stony structure, resulting in longer journeys to the surface and back. Why they do this is beyond me though it might have something to do with their streamline profile and shoaling nature, both of which are made easier when stationed over a bed of gravel. More solitary trout on the other hand, will hold just beneath the surface (on the fin) when nabbing surface food. Something else that separates grayling from trout is the latter invariably make for cover when they are alarmed, often hiding beneath tree roots, boulders, or undercut banks. Grayling, meanwhile, simply break rank when spooked, only for the shoal to regroup shortly afterwards, which is certainly down to the ‘safety in numbers’ mentality! Continually pestering a shoal though, will eventually send them to deeper and darker parts of a pool.