Good question there was never a bull shark in the delawere river plus a shark can go from an ocean to a lake or a river but there might of been one but the people should not have went swimmming there that there was a shark in the river but good question! :)
I'm not sure it was a whale shark but the river in Perth where sharks have been sighted is the Swan River.
All the way up the river
In the whale sharks family there are other whale sharks and other sharks
Whale Sharks are sharks
Yes there sharks in Delaware Bay.
Whale sharks - like the majority of sharks - are cold blooded.
yes. Whale sharks are very rare.
No, Whale Sharks are docile filter-feeders.
There are 100,000 to 200,000 whale sharks left
They are Sharks, therefore a fish. Very, very big: Plankton eaters.
Whale Sharks are Sharks, but big as some whales.
No, Whale Sharks are not nocturnal.They are mostly active during the day