The Infamous Mysis

If you live in Colorado you are well aware of the cult like following of Mysis Relicta and the tremendous growth rate of fish in the tailwaters that have them. The story in Colorado is one that most know, the introduction of the Mysis was to feed Kokanee, the state forgot to check and see if the salmon could eat the mysis (they couldn’t), mysis take over the lake as they feed on zooplankton, salmon and other species suffer because of this. This would have been the end to another failed government program except that the large bottom release dams where they were introduced made the mysis steroids for the fish living below the dam. The Taylor, The Frying Pan, and The Blue are known as the big mysis fisheries in Colorado all because they possess the proper dam construction (bottom release) and reservoir characteristics (big and deep).

1989 Colorado Mysis Report
1989 Colorado Mysis Report

Mysis were released into many reservoirs in Colorado, not just those big three that get published in Fly-Fisherman Magazine every 4 months. Not only were they put into many reservoirs by the DOW, but private citizens have also legally and illegally stocked other lakes with mysis, hoping that fish in the lakes would gorge themselves on the crustaceans. The best report I have found is from 1989, and it details 18 reservoirs where there are mysis shrimp. The study also gives us a little background on when trout eat the mysis in the reservoir and how, for the most part, they avoid predation altogether (they are crafty little buggers). The point being is that there is a lot of water out there, and I’m sure there are big fish that exist places that aren’t the “big 3”. Combat fishing on those rivers is never going to change, but if you have to fish mysis then there are other options for you. If you do try some of these places and the fishing is good, please let me know and I’ll be sure to return the favor.

Comments

  1. Alec

    I have been wondering if all kokanee salmon lakes also contain mysis, and if they do then why aren’t all kokanee salmon lakes also mysis tailwaters? If it has to do with the dams being bottom release or not, that’s interesting. Considering the amount of kokanee in eleven mile reservoir I would assume the presence of mysis which would make eleven mile canyon a mysis tailwater (which it’s not). Also wouldn’t the opposite be true in that the head waters of reudi res, Dillon res, and Taylor res all be fall salmon run fishing opportunities?

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  2. Eric

    Hi Nate, thanks for the info. What are some of your favorite patterns to imitate Mysis shrimp? I’ve found that when fish are feeding on them, they’re unlikely to feed on much else. We fished at Williams Creek yesterday and the big fat Brookies were puking them up like it was a Roman food orgy.

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      n.taylor

      Haha I’m a firm believer in either clear or “not clear” patterns. Sands epoxy mysis is a great epoxy pattern that looks clear in the water while Charlie’s Mysis is a pattern that is not translucent. Usually one of those two will give you a clue as to what type the fish prefer over the other. I carry several different types but those two are usually what I start with and go from there. Hope this helps.

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