6 ms·

I don’t think fish like CO2. It makes the water more acidic.

• pfdietz 2y ago
  The deep ocean is naturally acidic due to the natural carbon pump. Because of this, below a certain depth (typically around 15,000 feet), calcite and aragonite just dissolve (the "carbonate compensation depth") and there is no accumulation in the ooze. The carbon pump involves dead organic matter falling to depth, where it is consumed and oxidized, producing CO2 there.