No audio. These are newly born guppy fry, otherwise known as baby guppy fish. They are super tiny which is why I had a dime taped on the tank's glass to show the size difference. They are in an isolation box because the beta fish and adult guppies (Including the parents) can and will eat the babies. You can see the beta trying to get them in the background. The box gives them a safe isolated area of the fish tank. These baby guppies are only about a day old.