mysis/demon shrimps?
 

interesting read about non-native shrimps invading the UK lakes.... seems our okanagon lakes have a similar problem and that is why government of canada allows Piscine Energetic to troll for the mysis shrimp:

read: more about the demon shrimp ( small, similar in size I think to mysis)

http://www.independent.co.uk/environ...s-9119045.html

and how mysis was introduced in western canada...

http://www.mysis.com/about/about_us/

http://www.independent.co.uk/environ...s-9119045.html

relinked.

Interesting, thanks for posting.

Hmm, next time I go paddling on Okanagan Lake, maybe I can flag down one of their boats & get some freebies, although paddling at night could be hazardous to my health!