Puffer fish

On a walk in the intertidal region of the Marine National Park at Narara reef in Gujarat, I saw a live puffer fish (family Tetraodontidae) for the first time. I’d only seen it in restaurants in Japan, where it is called fugu. It is famously poisonous. One of these small fish contains enough tetrodotoxin to kill about 30 adults! But the neurotoxin is not genetically programmed into the fish, apparently the protective poison is accumulated from its diet.

The tiny thing was swimming at a leisurely pace. Our guide picked it up, and it came up almost as big as his hand. I was amazed by its big eyes; apparently puffer fish have very good vision. Inflating rapidly by ingesting water seems to be its main defense mechanism. It deflated to normal size and swam away as soon as it was released. Which of the over hundred species was it? An inventory of this region mistakenly calls it Tetraodon lineatus. It doesn’t look like this purely African species. Distribution maps and pictures eventually led me to the conclusion that this is the Takifugu oblongus.