Video link: https://youtube.com/shorts/Jb2eq_JayVs?si=3E_z6Yag5a_rm3o7
Growing on sponge filter in minnow and snail tank
Still when first observed. I moved a plant and stirred up some mulm. Here, they are consuming the mulm from the water column.
These appear white, unlike the vibrant green of some hydra. I'm not sure if these actually are white/clear or if the lighting at the back of the tank alters their appearance on camera. The transparent body of hydra might show what they are eating.
Edit: turns out some species contain symbiotic strains of algae, which makes them green, although they don't consume it.
Video: https://t.me/finch100100/34
From the home aquarium.
Green hydra in 10-gallon tank
In pond water, really little (1cm?) filter feeder.
video: https://youtu.be/vvo4XQ31Nos
must have originated from the plants, water, or silt from Bowling Lake, which i put in this tank