1000+ Live Daphnia Magna, commonly known as water fleas, and can reach up to 5.5 mm in size. They eat algae (green water), bacteria and yeast. They are excellent live food source for most fish and other aquatic organisms. Daphnia are effective in bringing many fish in spawning condition, and enhancing fish's colors. They can also be used in school classroom or in bioassays.****DOA: In case of DOA, please send several clear pictures of the original unopened shipping sealed bag with Daphnia in it within 2 hours of your local USPS delivery time, and shipping package to validate buyer's claim******