Dolphins and Bubbles
Hi, we were watching the attached video about dolphins. My
4 year old grandchild wants to
know what's in a bubble, and I'd like to know; do the dolphins use
these bubbles to get oxygen while under water?
The bubbles dolphins exhale (breathe out) consist mostly of Carbon Dioxide
which results from their process of respiration. Please refer to this URL
for a more detailed explanation of respiration.
The dolphins do not use the bubbles to get oxygen while underwater. The
dolphins have to come to the surface to inhale a breath that is about 20%
The video didn't come through to me, but I'm assuming it is a form of
feeding called bubble netting. Different species of dolphins and
whales have been known to blow air out of their blow holes as they
swim around schools of fish, encircling them in a "bubble net." The
dolphins then take turns darting into the circle to grab fish.
Dolphins have also been known to blow bubbles or bubble rings and
"play" with them underwater!
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Update: June 2012