Musically Inclined Fish

We have two fish tanks, a 55-gallon with some semi-aggressive fish, and a ten-gallon, complete with filter and light for our very spoiled Betta fish.  Each tank has one plecostomus to help keep it free of algae. These fish are commonly known as algae-eaters or bottom-feeders.  They are generally shy fish, hanging out behind the rocks or in plant leaves and coming out at night to feed.  If I turn on the light unexpectedly, I may see one scurry into hiding.

Plecostamus: photo courtesy of Wikimedia

Every day I make it a point to find the plecostomus in each tank either during or after exercise. Sometimes it's quite a challenge to spot them as their coloring blends in with the rocks or reddish plants. Yesterday I put my video on, and when the music started, both of them came out and started swimming around in the front of the tank.  The one in the smaller tank was chasing the Betta.

I've heard of animals reacting to music, but this is the first time I've seen these fish do it. I play that music almost every day--but this day they came out to play and dance.