For researchers in Japan, the latest of the argonaut mysteries concerns its “shell,” which is actually a self-built, paper-thin egg case that surrounds the females. This case—which is the ...

Two other identical egg cases were recently found in the Australian National Fish Collection. A dead female shark carrying the same egg case was also found in storage. It had been incorrectly ...

The shark Apristurus ovicorrugatus was identified as a new species over a decade after the first mystery egg cases were found in a Western Australian museum collection. When you purchase through ...