3 ms·

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.