Spoonbills might do well in a small body of water.

Check this out:

http://pubinternet.wp.state.ks.us/kdwp_info/news/hot_topics/144_lb_paddlefish_caught

 Quote:
Atchison Watershed Dam #7 was built in the early 1960s as a flood-control structure for the city of Atchison. It now doubles as a public fishing water under KDWP�s Community Lake Assistance Program (CLAP). It has no river flow through which a paddlefish could swim naturally, so Tjemeland speculates that someone may have caught the fish elsewhere in the past and put it in the lake.