It looks like a backswimmer or water boatman. You can tell this from the bilateral appendages that sticks out. But, important to determine if this is a back wimmer or water boatman. Backswimmers are predatory and I believe can eat fish eggs, they can also bite humans. While water boatman are herbivores/detritivores so totally harmless to fish eggs/us. For me – it’s hard to differentiate using just this video.
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Seed shrimp.
I just ordered 120 of those.
Not dangerous and quite beneficial.
Ps def keep it i spent money to get some.
https://preview.redd.it/0tbquad4ko7g1.jpeg?width=1183&format=pjpg&auto=webp&s=a9ac6da8303b25ad83d38dfd496a1bebc66ab8e6
Added a closeup screenshot
It looks like a backswimmer or water boatman. You can tell this from the bilateral appendages that sticks out. But, important to determine if this is a back wimmer or water boatman. Backswimmers are predatory and I believe can eat fish eggs, they can also bite humans. While water boatman are herbivores/detritivores so totally harmless to fish eggs/us. For me – it’s hard to differentiate using just this video.
Have a look at this article, you would have the best shoot at figuring it out since you have the most clear view of it and it’s swimming behaviour: https://www.whatsthatbug.com/backswimmer-vs-water-boatman/