The Japanese butterfish (Psenopsis anomala) is a marine fish also known by such names as melon seed, wart perch, ibodai (Japanese name, イボダイ) or simply but ambiguously as butterfish. This fish, which can grow to 30 cm (12 in) TL, is found in the Western Pacific, near Japan, in the Taiwan Strait and in the East China Sea. The Japanese butterfish prefers tropical waters: around 42°N–19°N. It has been found in the waters near Hong Kong. Japanese butterfish live and feed near the bottom as well as in midwaters or near the surface. Generally they inhabit the epipelagic layer to 370 m. Adults are mainly bottom-dwelling but migrate upward at night in search of food.