Venomous lumpsucker

The near future. With tens of thousands of species dying out every year, our last hope is the biobanks, impregnable vaults where their remnants can be preserved forever. Until one day an audacious cyberattack obliterates every single one. In the aftermath, a troubled conservationist and a crooked mining exec must team up in search of the venomous lumpsucker, a lost fish that they both desperately need to save. Together, they pursue it through the weird landscapes of the 2030s - a nature reserve full of toxic waste; a floating city on the Baltic Sea; the dangerous hinterlands of a totalitarian state. And the further they go, the deeper they're drawn into the mystery of the attack on the biobanks. Who was behind it? And why would anyone do such a thing?