Call it a ruse. An evolutionary act of deception. An athletic, evasive action, not unlike the quick-footed sidestep of a running back. In water, a crab’s forward-facing eyes and claws trick predators into thinking slow, straightforward easy meal. But when a redfish or tarpon attacks, a crab launches into an unexpected sideways flush of bubbles and debris. Claws and appendages fold back and trail its shell in an oddball orientation that doesn’t make sense. Unless you’re a crab. In which case,…