Hundreds of whale sharks congregate each Summer, probably to reproduce Hundreds of whale sharks, the largest fish in the world, have met up for their annual summer congregation in the Gulf of Mexico. The enormous fish converge in the coastal waters off Cancun from May to September. Some 250 whale sharks have been sighted so far in a positive sign for the species, New Zealand's 3 News reports. A record was set in 2009 with 420 whale sharks reported in a single aerial survey. Local biologist Rafael de la Parra says marine species such as dolphins, stingrays, tuna fish and...