Tuna are able to warm their entire bodies through a heat exchange mechanism called the rete mirabile, which helps keep heat inside the body, and minimises the loss of heat through the gills.
Porén, os túnidos son capaces de quentar todo o corpo a través dun mecanismo de intercambio de calor denominado rete mirabile, que os axuda a manter a calor no corpo, e reducen ao mínimo a súa perda a través das galadas.