Good observations J.W.. Makes me wish I had a fish tank! Now you know why it is better to fish too shallow rather than too deep, LOL!! Also note the configuration of the mouth how the lower jaw extends further forward than the top making it easier to "scoop" upwards when inhaling that baitfish. How many times have we trolled along unknowing that a monster Crappie was cruising along under our boat holding the jig in it's mouth just deciding whether to spit it out or swallow. No one can get all of them but knowing when that is happening and being able to detect the bite a larger percentage of the time is one of the secrets of catching more fish!! Have you started testing jigs in the tank yet?? LOL!!