A new species of shark recently launched off the coast of Western Australia is claimed to be the first true hybrid shark, combining both a traditional meat-digesting enzyme system and battery-backed electric drive.
While previous attempts at carbon-neutral sea-life, such as the electric eel, have been relatively successful in their particular niches, they have traditionally suffered from 'range anxiety', and larger sea animals have been unwilling to risk adopting the technology. Hybrid technology does not have a 'zero carbon finprint', as true electric fish have, but they are far more economical to run than a standard shark - when fully-charged a hybrid shark would be able to travel up to 800 kilometres before needing to chomp on a surfer's leg.
Some, such as UK expert Jeremy Clarkson, have criticised the new shark's "boxy" look, relatively poor handling at high speeds, and a dislike of the low-pitched whirring noise made by the animal - claiming the sound of it approaching would completely spoil the surprise of a shark attack, making future movies such as Jaws utterly unbelievable.
Other shark experts have questioned the motives behind these developments, reasoning that increased atmospheric CO2 and higher sea levels would not be in any way detrimental to the life of the average sea predator. Shark advocates claim it is simply a matter of economics, the cost of fish has risen dramatically in recent years and with the recent increase in capacity and reduction in price and weight of Lithium-ion based batteries it makes perfect sense to adapt and survive.
Of course, this has not convinced everyone, and some commentators have even gone as far as to suggest that the real motives for electrified sharks may be far more sinister, possibly connected with research in the 1990s into weaponised shark systems
 Evil et al, 'Autonomous 1kw roaming laser defense systems using frikking Selachimorpha', Nature, 1997 p238-244