Answer:
The biggest shark weakness is going in the state of tonic immobility when they're upside down. Other than that, have fun trying to poke it's eyes, gills or to punch its snout.
Explanation:
Intestine, Bladder, Stomach, Oesophagus, Bronchi and in the walls of blood vessels. Most of it is found in internal organs expect for the heart because that is cardiac muscle.
Innate behavior is very often considered to be th eresult and a consequence of learning which was done in the earliest stages of life; womb, infancy up to childhood possibly. Most of the time, this learning has to either be model learning of reinforcement learning where the organism or child, if we're talking about human beings, get feedback once they do something; either negative - diminishes the behavior, or positive - increases it.