Re: Hot blood vs Cold blood
Nope. Central to aerobic metabolism is the TCA or Kreb's Cycle. The enzymes involved are critical to cell function, such core functions tend to be very highly conserved. There is not much difference between us and fish here, and fish do not have multiple sets of TCA enzymes optimized for different temperature ranges. Swapping enzymes can't change the underlying physics: chemical reactions occur more slowly at lower temperatures. That's why even a small boost to core temp is such an advantage for a predatory fish, as it can then outrun both its competition and prey.