Related Experiment Video
Updated: Aug 12, 2026

10:14
Wireless Electrophysiological Recording of Neurons by Movable Tetrodes in Freely Swimming Fish
Published on: November 26, 2019
Abstract:
The brain and eye of swordfish are warmer than the water. Associated with one of the eye muscles is a tissue that heats the brain. This brain heater is rich in mitochondria and cytochrome c and is supplied with blood through a vascular heat exchanger. It protects the central nervous system from rapid cooling during daily vertical excursions which may take the swordfish through a wide temperature range.

