A newborn killer whale found bleeding on a Mexican beach has become the centre of an international controversy over whether she should stay in Mexico or be sent to a U.S. marine theme park. Her caretakers say there is no tank in Mexico big enough to keep her when she grows and she will die if put back in the sea or kept in an aquarium that is too small for her. Some environmentalists oppose transferring Pascuala to Sea World, however, because it could set a precedent that might enable animal traffickers to export more killer whales, also known as orcas. "It hurts us that this animal might die, but we cannot set a negative precedent," said Alejandro Olivera, head of ocean campaigns for Greenpeace in Mexico. The Mexican government's environmental protection agency has so far blocked a transfer to San Diego, saying Mexico's wildlife should not leave the country.