4 ms·

A fish with a GPS tracker perhaps? If they attach them to ground animals, why not water?

• psykovsky 11y ago
  They also/already attach them to whales, sharks and dolphins, at the least. I bet someone, somewhere, have done it to a fish...
  • kaybe 11y ago
    The limit is probably the size of the tracker. The ones I saw look about as big as a standard river fish..
  • a3n 11y ago
    Try otters. They'll eat the zebra mussels when they're done.