Sharks could also be consuming cocaine dumped within the waters off Florida and it could possibly be making them act in "crazy" methods, scientists have stated.

Researchers investigating whether or not drugs dumped overboard influence the area's marine life for a documentary discovered some sharks gave the impression to be performing surprisingly and others responded to related stimulants.

Smugglers have left numerous tonnes of cocaine within the seas round Florida, transported from South and Central America, both to be collected by associates or to keep away from arrest. The medicine are then typically washed into shore on ocean currents.

Just final month, the US Coast Guard seized greater than 14,100 kilos (6,400 kg) of cocaine within the Caribbean Sea and Atlantic Ocean, with an estimated worth of $186m (£142m).

Marine biologist, Tom 'The Blowfish' Hird, and University of Florida environmental scientist, Tracy Fanara, studied sharks off the Florida Keys to see if the medicine had been having any influence on them.

During one dive to look at behaviour, a terrific hammerhead - a species which usually avoids people - got here straight on the group and gave the impression to be swimming wonkily.

Researchers additionally recorded a sandbar shark which gave the impression to be fixated on one thing and was swimming in tight circles, regardless of there being nothing in sight.

Dummy medicine set off 'loopy' shark feast

As nicely as monitoring the sharks, the scientists additionally put packages related in measurement and look to actual cocaine bales within the water subsequent to dummy swans as a part of their research.

To their shock, the sharks headed straight for the bales - not the swans - taking bites from them.

One shark even grabbed a bale and swam off with it.

Next, the researchers made a bait ball of extremely concentrated fish powder. This was designed to set off a dopamine rush as near successful of cocaine because the group might feasibly (and ethically) do in an experiment.

When the sharks ate the powder, the researchers noticed them going wild.

"I think we have got a potential scenario of what it may look like if you gave sharks cocaine," Mr Hird stated within the movie Cocaine Sharks, made for Shark Week on the Discovery Channel.

"We gave them what I think is the next best thing. [It] set [their] brains aflame. It was crazy."

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Finally, the group dropped their pretend cocaine bales from an aeroplane to simulate a real-life drug drop - and a number of shark species, together with tiger sharks, moved in.

The biologist admitted many alternative elements could possibly be liable for the odd behaviour and the outcomes do not essentially present that sharks in Florida are consuming cocaine.

Mr Hird stated: "We have no idea what [cocaine] could do to the shark."

He added that analysis reveals totally different fish seem to react in numerous methods to the identical chemical, Live Science reported.

"So we can't even say 'well this is a baseline' and go from here," he stated.

But he stated he hopes the TV programme, attributable to air later this month, will result in extra analysis within the space, and particularly on how prescribed drugs of every type have an effect on the animals.