Sharks are also struggling with the contamination of their environment. Not only have sharks absorbed the highly toxic methyl mercury which comprises, amongst other things, their ability to reproduce successfully, but now scientists are also finding other strange neurotoxins (possibly linked to brain diseases like Parkinson’s and Alzheimer’s) in their flesh.
Chemicals, whether dumped or via run-off, enter the food chain and become concentrated as they make their way up the food chain. The massive amounts of plastic pollution in our ocean breaks down into small polymer particles which will take hundreds if not thousands of years to bio degrade..- Some seawater has 7 times more plastic in it than zooplankton. All of these chemicals are slowly poisoning the sharks – and anyone who dares to eat them.
As if that wasn’t enough bad news, sharks are also threatened by the destruction of habitat. Many sharks and rays rely upon estuaries as nurseries for their young.
And sadly, estuaries around the world are disappearing. Not only are the fragile ecosystems more susceptible to pollution and overfishing, they are often considered prime real estate.