
Pictures of the marsh spider, Arctosa fulvolineata during an experiment. In the first image (a) the drowning begins, in (b) the spider becomes nonreactive (see the reduced air storage), in (c) the spider has entered a coma and in (d) it is recovered four hours after the end of submersion.
Spiders are known for their resilience to being underwater, so it was no surprise to him that the dozens of Arctosa Fulvolineata in the experiment took almost 24 hours to grow still. What did surprise him is the dead-still spiders then came back to life.
As they lay drying in Petillion's laboratory at the University of Rennes in France, something odd happened: the 'dead' spiders began to twitch. First one small movement, then another - before long the salt marsh spiders were skittering about as though nothing had happened.