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Because their lungs are so large.
Because they can, and it's free
Praying Mantis are insects, they do not have lungs (gas exchanges happens using spiracles) so they can not hold their breath.
No. Monkeys are mammals, so they have lungs, which cannot filter water. They can hold their breath underwater, though.
Myoglobin enables the marine mammals to be able to hold their breath for extended periods of time underwater. The beaver has been reported to hold its breath underwater for about 15 minutes.
starfish are aquatic, so for its entire life i guess
Yes they do, but they also breath under-water. They can breath under-water for 14 hours.
There is a myth that mermaids can hold their breath underwater indefinitely, but in reality, humans can hold their breath anywhere from 1-3 minutes on average. If mermaids were real, they would likely have similar breath-holding capabilities to humans.
To dive deep into the ocean and hunt for its prey.
By closing the hippos ears and nostrils, the adult hippo can stay under water for as long as six minutes.
Your lungs don't stop working but if they do and I didn't know that you have as long as you can hold your breath for so it varies.
They do not need a respiratory system since their skin is thin enough that the body is oxygenated by diffusion. So since they don't breathe they can't hold their breath.