i used to try and fool them by throwing small flat rocks
flipping fast into the air to simulate a fluttering moth
they would follow it for a few seconds then abandon the
chase when the sonar ping came back revealing a solid object
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there's too many other indications that fish use both sonar...
and scan also for electrical stimuli ...hammer head sharks for example
use that t-shaped head
exactly like a metal detector
and sweep the bottom for prey hidden in the sand...
searching for electrical impulses
and dolphins send sonar into the sand to find food then they go to the spot and dig the creature right out of there...with their beak
or nose....whatever the freak ya call it
~
many times fish especially bass will do a drive by (swim by)
A. to get a better look at the food object as they do an arch
circle past it...since their eye is on each side of their head
B. i think they may be using the lateral line sensor array do do a preliminary scan of the food object before they strike if not sure.
C. of course other times they just strike with reckless abandon....
D: they purposely bash into it to stun it and it just seems like a short strike when they are trying to tail wack it like a whale does.