- Dolphins Recognize and Admire Themselves in Mirrors.
- There are 40 extant species of dolphins.
- Dolphins have the longest memory in the animal kingdom.
- Dolphins can communicate with one another over a telephone, and appear to know who they are talking to.
- with the tail first instead of the head.
- Male dolphins are called "bulls", and females "cows".
- A 2-headed dolphin was discovered on a beach in Turkey in 2014.
- Dolphin copulation happens belly to belly.
- Dolphins give each other names and will answer to it even when called by dolphins they don't know.
- Infanticide has been observed in bottlenose dolphins.
- There are albino bottlenose dolphins.
- to express delight.
- A study indicates that dolphins talk to each other in sentences.
- Dolphins shed the top layer of their skin every two hours.
- Dolphins trained to kill for the Soviet navy were sold to Iran because they could no longer afford to feed it.