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I'd believe that they could hang upside down with their feet at the surface. I wouldn't believe that they could actually propel themselves across the surface; a
by dtgriscom 5y ago
I'd believe that they could hang upside down with their feet at the surface. I wouldn't believe that they could actually propel themselves across the surface; any movement would be due to water currents.
- enriquto 5y agoThey definitely propel themselves. Even if I stop the filter so that there's no water circulation, they can walk on the surface just as fast as they do on the glass (which is quite slow, but still). Think about it: water striders propel themselves quite fast on the surface of water, from the other side. The air/water interface is a though barrier to break for small beings. Thus they can use it for support, from either side.