So can other fish like the opah.

其它一些鱼类，例如月鱼。

Research shows that the deep sea opah, or moon fish, is able to keep its entire body including its heart and brains about five degrees warmer than the surrounding water.

研究表明这种海月亮鱼能够保持包括心脏和大脑在内的整个身体温度高5摄氏度。