Blue gill mortality? Didn't think you could kill one of them!

Last year: Caught a blue gill. Put in the back of the kayak (in air). Fished another hour. Drove home. 30 minutes later I was filleting bass and that one blue gill. The bluegill was swimming in the sink after I filled it up! I think they are about the most hearty fish there is. Bass a close second. Trout? Look at a trout the wrong way and it will die!