
Carinotetraodon travancoricus
A one-inch freshwater puffer with huge curious eyes — tiny, smart, and mean as a bouncer at a snail bar.
Feed daily — snails and worms, teeth stay trimmed. One inch of pure personality: they beg, they spy on you through the glass, and they remember the pipette.
Species-only tank or with very fast, short-finned companions — everything else gets nipped.