I'd consider this a predator. It's also a small size fish that will work in a nano. Only issue is they're good at hiding, wedging into spaces and they also camouflage very well against anything white, grey, tan or black.
I consider it a predator because it eats fish roughly it's own size. A scooter got to close to his hidey hole and was gone in an instant.
Clingfish Goby - FloridaPets
floridapets.com
I consider it a predator because it eats fish roughly it's own size. A scooter got to close to his hidey hole and was gone in an instant.