Though P. karlraubenheimeri is extinct, its descendants live on today: Pseudocarcinus gigas, also known as southern giant crabs or Tasmanian giant crabs, are this ancient creature’s modern ...

Additionally, horseshoe crabs have a reproductive strategy that includes spawning in large numbers, which increases the chances of survival of offspring despite environmental fluctuations.

A sister species to the American horseshoe crab — the tri-spine horseshoe crab in Asia — faces similar threats and is nearly extinct. “It is clear from the available science that the current fisheries ...