but importantly, at an organismal
level, having internal warmth in metabolically active tissues coupled
with a heart exposed to ambient temperatures (due to close proximity
to the external environment and a coronary circulation at the temperature
of ambient water) poses unique O2 transport challenges in these
fish. Inmost animals that rely on Hb as an O2 transport protein, O2 affinity
decreases with increasing temperature, decreasing pH and increasing
CO2 levels