Goldfish can learn to navigate a small robotic vehicle on land

Someone got tired of walking their goldfish?

What's this like from the fish perspective... "I can swim but the currents are so messed up it takes forever to get anywhere." Probably "feels" like really thick (high viscosity) water.

Fishermen beware: technological enablers of piscine vengeance now exist! Watch your 6 for fish tanks crawling out of the bushes behind you on the stream banks. I wonder what they'll do for weapons.