The oceans are a deep, dark and still very mysterious place to humans, and indeed this is a great part of the reason for the appeal of saltater aquariums and reef tanks. But the ocean is not just mysterious to…
SciShow explains the different ways that fresh and saltwater fish get water
Aquarists spend a lot of effort trying to get the salinity levels in their marine aquariums just right. And if they don’t they really should since fish have evolved special mechanisms to regulate the content of water inside their body in…
