Bottom-dwelling squid and octopus usually attach their eggs to a hard surface, but open ocean squid have no such luxury. For many years, scientists thought such squid simply released their eggs to the whims of the currents.
Say you’re visiting Los Angeles and you have a sudden craving for Chinese food. Since you are only visiting, you might not be aware that nothing is open past, like, 10pm (not even coffee houses), but you get in your rental car and go driving around in search of your Chinese feast anyway.
Oxygen-poor zones are not just found off the coast of South America, as we saw last time. “Oxygen minimum zones” may occur throughout the world’s ocean’s at mid-water depths where food consumption is high but supplies of oxygen are low.