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Many factors come in to play, such as the age and size of the animal. A baby with underdeveloped lungs surely can't hold it's breath for as long as a matured specimen. Water temperature is also a factor.

It is not too out of the ordinary to observe a boa swimming underwater for several minutes at a time on just a leisurely swim, and they have been known to stay under for 20-30 minutes during mite infestations in an attempt to drown the parasites.

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10y ago
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13y ago

The diaphragm contracts causing the lungs to expand creating a partial vacuum which results in air being drawn through the nostrils into the lungs. The diaphragm then relaxes causing the air to be expelled.

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14y ago

Sea snakes can hold their breath for up to an hour, and not many other snakes swim.

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15y ago

a rainbow is 400m

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Q: How long can a boa constrictor hold its breath?
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