Cold vs. Warm Water
Cold waters tend to have less seafood species but larger quantities of those species, whereas warm waters have more variety of species, but smaller quantities of each.
Fresh vs. Salt Water
Fish can be wild-caught or farmed in both fresh and salt water, and both require careful management of population and pollutants to protect ecosystems and safe consumption.
As much as possible, it’s best to allow fish to flourish in their natural habitats. As aquaculture has advanced over the last few decades, this can be achieved in wild and farmed populations.