That is a porcupine puffer. He's rather gentle and shy until it's feeding time. I've noticed that when he sees me with the plastic cup with defrosted prawn overhead about to be poured into the tank, he comes straight to the top and starts to spit water up and out of the tank towards the cup (hence, why they are sometimes called blow-fish) in an effort to knock the cup into the water. I've been using the same red plastic cup for years for feedings so anything red, especially something that resembles a cup, he will race back and forth at a high rate of speed causing wakes and sometimes causing water to spill out or splash out.
|