Malta National Aquarium - Meet one of our aquarium cleaners 🧼 🐠 The sucker-mouth catfish help clean the glass from algae, just like they suck algae from the bottom of the rocks

Blue-green algae sucked out of Palm City Canal

Cleaner Fish Profiles - Best Cleaner Fish for Freshwater

9 Algae Eaters With Goldfish – What Are the Best Choices?

What are those black fish that suck on the glass called? - Quora

Sucking Glass

What are those black fish that suck on the glass called? - Quora

The 10 best algae eaters for tropical tanks - Practical Fishkeeping

Fish sucker mouth hi-res stock photography and images - Alamy

Fish Aquarium Sucking Glass Large Mouth Stock Photo 1518803675

What are those black fish that suck on the glass called? - Quora

Sucker fish aquarium hi-res stock photography and images - Alamy

Fish sucker mouth hi-res stock photography and images - Alamy