You're setting up a freshwater aquarium and need to figure out how many fish can safely live in your tank without overcrowding them. Build a single-page widget where a user enters their tank size in gallons, then adds fish one at a time by selecting a species from a small preset list (e.g., Neon Tetra, Goldfish, Betta, Guppy, Pleco) — each species has a fixed 'inch size' value. The app tracks the running total of fish inches added and compares it against the classic '1 inch of fish per gallon' rule to show whether the tank is safely stocked, getting full, or dangerously overcrowded. Users can remove individual fish from the list and reset everything to start over. Display a clear visual indicator (color-coded status bar or emoji-based feedback) that updates live as fish are added or removed.