Saturday, May 16, 2015

All Fish are Cold-Blooded when they aren't. Biology teachers everywhere, adjust to the new reality.

The opah fish makes use of counter-flow heat exchange in the blood vessels coming from its gills to keep its internal temperature high. That keeps its muscles warm and lets it swim fast in the cold, deep water where it lives.

(July'15) It's not that warm. The opah keeps its temperature 4-5
°C above water temperature.

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