1, species and classification: puffer fish and Spinibarbus barbatus belong to different families and genera. The puffer fish belongs to the family Tetraodontidae, and the spiny dolphin belongs to the family Spinibarburidae, with the scientific name Diodontidae.

2. Appearance and morphology: The appearance and morphology of puffer fish and spiny dolphins are different. The puffer fish has a round body, smooth skin and no obvious thorns. Spinibarbus barbatus has a long body, and its back and sides are covered with hard thorns, which can stand up to form a defense mechanism.

3. Toxicity: The toxicity of puffer fish and spiny dolphins is also different. The viscera and skin of puffer fish contain a neurotoxin called tetrodotoxin, which is extremely toxic and even fatal. Spinibarbus barbatus has low toxicity and will not pose a serious threat to human beings.