12 random facts about dolphins

The name "dolphin" comes from the Greek words "delphis" and "delphus," meaning "fish with a womb"
Dolphins don't drink water because they get it from the food they eat
Although dolphins have teeth, they swallow food without chewing it
Dolphins are believed to have the longest memory in the animal kingdom
Dolphins have no sense of smell and do not have a good sense of taste
Dolphins sleep with only one brain hemisphere at a time, in slow-wave sleep, to maintain enough consciousness to breathe and to watch for possible predators
Dolphins are altruistic individuals and tend to stay with ill or injured individuals for prolonged periods of time
Dolphins call out to each other by their names
Dolphins are trained by military forces to spot mines and find lost humans
Dolphins are not monogamous (so not halal mode)
Dolphins are highly intelligent marine creatures - they can learn, play, socialize, and grieve just like humans
The average life expectancy of a dolphin is 25 years, but they can live up to 50
Nana and Nellie are the longest-living dolphins on record. They lived 42 and 61 years, respectively

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