It is particularly well developed in lobsters and crabs.
We lent him a string, and he started pulling in crabs.
Here it can be observed in worms, starfish, crabs and molluscs.
The first floor contained a fish market specializing in lobsters and crabs.
This week he'll be getting in male blue crabs from Maryland to go with the sweet corn he sells fresh nearly year-round.
Although many other groups have undergone similar processes, carcinisation is most advanced in crabs.
He now buys $2 million to $3 million in crabs every year.
Along the river mouths there are extensive wetlands once rich in fish and crabs but now polluted by industrial waste.
The food stalls and restaurants will specialize in fresh blue crabs which Sorsogon is known for.
Heat butter in small nonstick pan over medium heat, and brown crabs on both sides, about 3 minutes a side.