Olympic athletes protect themselves against sunburn primarily by applying broad-spectrum sunscreen with a high SPF, reapplying it regularly, especially during outdoor events. They also wear protective clothing such as long sleeves, hats, and sunglasses to shield their skin from UV rays. Additionally, many athletes seek shade during breaks and schedule their training or events to avoid peak sun hours. These measures help minimize their risk of sunburn while competing or training in sunny conditions.
I don't think they have a way of protecting themselves. They are usually eaten by whales anyways and there isn't much protection from a whale if you are as small as krill. They can protect themselves but not against whales. They protect themselves by traveling in large numbers.
When danger strikes, the cattle protect themselves by running away, by charging themselves and using their horns against the attackers and by kicking with their rear cloven hooves.
their stomach gas
they run away from them or they eat them
Mutually Assured Destuction (M.A.D.)
strong jaws
testifying against themselves
Rockhoppers are very small animals. They cannot protect themselves against predators very well because of this, so they are easy prey.
To protect themselves against nomadic invaders, and against aggressive neighbours.
Their bristly spikes make them really hard to get to.
democracy
by there wing to fly