Here are some high-speed videos I have taken recently of guppies feeding on two prey types: relatively easy to catch brine shrimp nauplii, and very difficult to catch freshwater copepods. The copepod trial just happened today, and I am excited that I have found an evasive prey to challenge these guppies. Since I want to look at differences between populations, I need a prey that's going to make them work. Otherwise, those differences might be hard to find.
Without further ado...
A guppy capturing brine shrimp:
and a guppy capturing (or rather not capturing!) a copepod:
**All procedures were approved by the Institutional Animal Care and Use Committee at Colorado State University**