Sea-run Cutthroat Trout, the anadromous life history of Oncorhynchus clarkii clarki are what lured me back to fly fishing after a school/work/whatever induced hiatus of too many years. Roderick L. Haig-Brown said it much better than I can in A River Never Sleeps:
The cutthroat, the coast cutthroat of tidal waters particularly, is such a down-to-earth, workaday, unspectacular fish; he fits into his environment so perfectly and makes such good, full use of it, following the tides and the salmon runs and the insect hatches to the limit of their yield; and he has not been, as the rainbow has, more or less successfully transplanted to all parts of the world. He lives in his own place in his own way and has his own special virtues. He is a little like the burned stumps and slash and new growth of the old logging works in that one must know and deeply love the country to appreciate him properly.
To say I’m enamored of these creatures is an understatement. I’m deeply appreciative of the pleasure and peace I derive from the pursuit of our Coastal Cutthroat with the fly rod.