Here's what we know:
* They are known for their whistles. These whistles are used for communication, similar to how birds use songs. Each dolphin has its own unique whistle, which they use to identify themselves.
* They also make clicks and bursts of sound. These sounds are used for echolocation, which helps them navigate their environment and find food.
* Pink dolphins are also known to make squeaks, barks, and other vocalizations. These sounds are used for a variety of purposes, including social interaction, courtship, and warning calls.
While we're still learning about the specific meaning of all their sounds, it's clear that pink dolphins are highly vocal animals with a complex communication system.