Potamophile

Strombomonas is apparently a potamophile alga, but does occur in still waters.

Strombomonas species, which appear to be potamophiles, may be abundant farther downstream.

The first attempt at the classification of parasites of fishes by their reaction to salinity was made by Heitz (1918). He had divided the parasites into four groups: (1) the marine, occurring only in the sea; (2) the potamophile--only in freshwaters; (3) the marine-potamophile occurring more often in the sea than in freshwaters; (4) the potamophile-marine found more often in the sea than in freshwaters.

Yachting enthusiasts, potamophiles should request further detailed information and illustrated brochure from:[…]

With further experience she quickly became a potamophile, to coin a needed term for those of us who are besotted by rivers.

But you don’t have to be a scientist to be a potamophile (someone who loves rivers). Anyone can exercise his potamophily (love of rivers) and his legs along the bank of his favorite river.

If a wine-lover is called an oenophile, what’s a river enthusiast? It’s not a word you see very often. Cambridge University Press will tell you a “potamophile” mayfly prefers “slow-current lowland waters.” Sounds about right for the Eastern Shore. And so potamophiles are in luck, with two celebrations of the rivers defining the county’s borders in one weekend.