the loggerheadurtle, for examfish, jellyfish.ng. makes sure no individualuscs, species can take over. if things start to tip out of balance, the sea turtle helps to get things back into equilibrium. >> one of the biggest threats to the sea turtles is the fishing industry. baha landed in a fishing net as bycatch. once the juvenile turtle has recovered and is able to dive for food again by herself, she'll be released back into the sea. but first the scientists want to take blood and tissue samples to analyse her dna. the data is needed for an international research project, studying the effects of plastic pollution on sea turtles. meanwhile, efforts are underway to curb the numbers of blue crab. a tunisian company called golden fish is now making money from the invasive shellfish. other companies along the gulf of gabÈs are doing the same. in other parts of the world, e blue cb is a dicacy. so they're now being caught, taken apart and frozen, ready for export. last yr alone, the company sent out 60 tons of crab and ab meat. most othe