Very interesting article about fish sounds!

[Jon_D]

https://www.smithsonianmag.com/science- ... 180977152/

[keithmart]

Hi

I am sure most aquarists have heard fishy noises from their own tanks.

Some years ago I set up a tank as a native seashore tank. The main fish in it were blennies. They make a noise like glass cracking. Most dis concerning when heard for the first time, especially in a home made tank.

[BigBen]

The most common noise I've heard is Discus picking at sealant in an old tank. No wonder it leaked

[Martinspuddle]

Pistol Shrimp or Alpheid Shrimp use to make a lovely cracking sound in my old reef aquarium. These small shrimp use their larger claw to make a snapping sound to stun their prey.

This video below is from 'Foo the Flowerhorn' on YouTube. Sparkling Gourami (Trichopsis pumila) croaking in his Walstad style 5 gallon aquarium. I believe he said he had put a microphone against the glass to record the sound and increase the volume in editing the video.