poke them with his nose
dolphins defend themselve by using their mouths againts predators like sharks and orcas
Like most dolphins, the main defense mechanism of the Bottlenose Dolphin is travelling in groups. They'll use their speed and grouping to confuse predators, attacking if necessary.
Dolphins hide in any place available, but they also ram sharks or other enemies, though they usually do this to defend another animal (a relative or human). You can read more on google or anywhere else.
they form a tight circel around their young and make fast lunges at the thing that is threating them
Sloths have a very unique way of protecting themselves. Firstly, their black, grey fur blends in with the rainfoest, and secondly,....... They move so slowly that predetors can't see that they're there!:)
Possible threats to bottlenose dolphins include habitat loss due to coastal development, pollution from runoff and oil spills, entanglement in fishing gear, and hunting or captivity for entertainment purposes. These threats can impact their food sources, disrupt their migration patterns, and lead to injuries or fatalities.
Dolphins are hardly violent at all; they are often known to be quite passive and prepared to befriend people. They can get aggressive when necesary to defend themselves, but this is to be expected of any species.
crocodiles and sometimes people. P.S. river dolphins can defend themselves and live in groups so they don't have a lot of predators.
Porcupines defend themselves with their quills.
I do not think squirrels defend there selves in my opinion they usually run away very fast from dogs or any other predetors that chase or eat them.
The best answer would be in no way do they harm humans. There have been many stories of dolphins saving humans than there have been stories of dolphins hurting humans. If you would like a better answer I suggest you look in a book about dolphins and how they defend themselves.
They defend themselves by releasing disgusting slime when attacked.