Groups of five penguins are capable of fending off a predator together. They simply swim together and merge into a larger, more badass entity. This natural example was where they got the idea for Power Rangers.
Their quills.
They use their horn to ward off predators.
Sting is the main one.
most likely no most likely no
the color off their fur helps hide them
Leopard seals.
Yes, they kick very hard with sharp claws and can run very fast and go into small places like brambles and burrows in the ground to hide from predators.
Being nocturnal is a way of avoiding predators. The Adelie and Emperor penguins do not have any predators on land.
They don't have any.
yes they do have defenses against enemies
No,of course.............
I don't know if this a defense or merely a way to escape being eaten, but most species of geckos can detach their tail when they get scared or when it is grabbed. It will grow back later.