Some type of fish change colour as a warning, and others are poisonous. Fish that swim in large groups flash light using their scales as mirrors to bounce sunlight into predators' eyes to confuse them. Other fish bury themselves underground. Some species have even developed "wings" to escape predators.
Fish do have reflex actions.
A defensive driver anticipates the actions of the other drivers and is prepared to take evasive action. He or she is always on the alert.
Nope - it's instinctive.
defensive
defensive
defensive nova net
Driving to save lives, time, and money in spite of the conditions around you and the actions of others.
Under dangerous circumstances, all animals will self-destruct.
A puffer fish moves like any other fish. They swim through the water and puff up when they feel that they need to be defensive. They have tiny fins.
There are many animals that exhibit a variety of defensive actions. Snakes for example will bite if cornered or surprised.
~defensive actions can be rapidly implemented in areas where threats are present ~mission-degrading protective actions can be reduced in unaffected areas
Defensive strategy by the union army at Gettysburg, the position resembled a fish hook to prevent the confederates from striking at any position.