Today Bill Foster and a helper, Colleen, came to Caroline and led us in an experiment with our ever-growing hungry little trout! So far we've been feeding our trout three times a day this dry, crumbly, non-living fish food. But does that happen in nature? Do we go to streams and lakes and dump in enough fish food for all of the things living in it? NO! Our trout don't have parents to help teach them what to do in nature, so we took several trout out of the aquarium, put them in beakers, and dumped in some living Daphnia. The tiny Daphnia swam around and we wanted to see if our trout would have the instinct (a natural or intuitive way of acting or thinking) to eat the Daphnia or not.
Cool picture of Daphnia in the shadows:
Watch what happened: