BraveEarth do you really want to take the four hours to forage food/water without a base camp, just before high noon (the hotest point of the day), and without having explored the base camp?<br/><br/>As to your other checks. You see some footprints in the sand going to and from the waves and where everyone was laying. You also see a strange drag mark just under the water thats out about knee deep.<br/><br/>As to your knowledge nature check, you know the crustaceans are called eurypterids (aka sea scorpions). They're poisonous vermin and are generally slow on land. Like most arachnids they're carnivores and the size these are easily put humans in their size range for prey