Most people think goldfish are dumb, but they’re actually smarter than you might expect — they can recognize faces, navigate mazes, and even remember things for months, not just seconds. But yes, there are fish that are considered less intelligent than goldfish. Here are a few often thought to be "dumber" (based on behavior, learning ability, or brain-to-body size ratio): --- 🐟 1. Guppies Tiny, pretty, but not known for problem-solving. Tend to repeat the same mistakes and lack long-term memory. --- 🐟 2. Mollies Very passive and simple-minded behavior. Don't show much sign of learning from their environment. --- 🐟 3. Tetras (some species) Some tetra species (like Neon Tetras) are very reactive but not particularly adaptive. They rely more on instinct than learning. --- 🐟 4. Betta Fish (in basic tanks) Intelligent in some ways, like recognizing owners, but when kept in small tanks with no stimulation, they tend to show very limited behavior. --- 🧠 What makes a fish "dumb"? Fish intelligence is usually judged based on: Ability to learn Memory retention Problem-solving Social behavior Goldfish actually do pretty well in all of these, surprisingly. --- If you want to compare fish intelligence rankings or plan to get a pet fish, I can help suggest smarter ones too (like cichlids or elephantnose fish). Want that?