Green hydra under dark field
Group: Hydra · Hydra (freshwater polyp)
What you see
Filmed in dark field: the organism shines against a black background, and edges and cilia look bright.
Recorded on 9 September 2020. This loop is the 0:59–1:24 part of a 2:24 recording; the full recording is on Commons.
Points to check against your own sample:
- Contracts to a small blob when disturbed and stretches out again slowly.
- Hydra viridissima is green from algae living in its cells; other species are brown or white. Buds grow on the side of the body.
Full description and look-alikes: Hydra.
Credit line
Video: Janeklass, CC BY 4.0, via Wikimedia Commons