科: Tetraodontidae
巧克力娃娃为鲀科鱼类，好奇大胆，会咬同缸鱼的鳍，原生分布于南亚（印度）。喙齿终身生长——硬壳猎物不是零食，而是必需品。成体约 2.6–3.9 cm，单养，留出巡游空间，适宜水温 22–28 °C。定期喂螺，牙口才不坏。
Carinotetraodon travancoricus is a Tetraodontidae from South Asia (India). Its beak never stops growing — hard-shelled prey is not a treat but maintenance. It lives on the bottom. Adults reach 2.6–3.9 cm. Singly, with room to patrol. Offer snails routinely, keep water pristine, and choose tankmates (if any) larger than its interest. Maintain 22–28 °C at pH 7.5–8.3. A rewarding species for the aquarist who reads before buying.