Hydra Fusca polyp in my Aquarium.

This video is taken with my Canon EOS 1000D. I set it up for remote shooting and captured my screen. Sometimes the video gets really blurry because I had to use manual focus. Also the video speed is 2 times the normal speed. Hydra is included in the phylum Cnidaria, along with sea anemones, jellyfish and coral polyps, and is one of the few freshwater members of this group. One feature all members of the Cnidaria have in common is the possession of thread cells or cnidia or nematocysts -- tiny stinging ce