In biology we gotta poison daphnias

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Its to study there toxicity treshold, but why daphnias, they look like innocent little birds

Daphnia are small crustaceans known as waterfleas. This is a common experiment that I thought would be outdated by now. There are generally no rules regarding animal care of the lower animals.

Luckily, we could choose the way to kill them. One of the choices was vegetal oil so me and my friend didn't hesitate to take it. I hope they won't be dead today.