THIS IS SO COOL! I want to try to build one for my cat! 🐈 Cats love watching fish tanks for a few simple, instinct-driven reasons: They’re natural hunters. Moving objects—especially small, darting ones—trigger a cat’s prey instincts. Fish glide in unpredictable patterns, which is fascinating to a predator’s brain. The tank is like TV for them. The colors, motion, and reflections create constant stimulation. A fish tank is basically a moving, glowing screen designed to catch their attention. It’