Do Fish Like When You Tap on the Glass?

Tapping Scares Your Fish

Let's get the obvious out of the way: tapping on the glass scares your fish more than anything. Even if you gently tap on the glass, your fish will swim far away — and may never come forward again.

Why is my fish looking at the glass?

Fish exhibit many behaviors that tell us how they are feeling, and glass surfing (also known as pacing) is one of them. This is when fish constantly swim up and down the sides of the aquarium glass. One reason they do this is stress. It could mean they aren't happy in their environment, for one reason or another.

Can fish in tanks hear you?

However, yes, they can hear your voice.

They just know someone is speaking. They can associate sounds with action, though. For example, if you are to say your betta fish's name – let us call him George – each time you sprinkle food in his aquarium, he will eventually associate the sound of “George” with food.