Mutant Clams
![](https://whobackwhen.com/wp-content/uploads/giant-mutant-clam-doctor-who-back-when-1.jpg)
Picture regular clams. Ok? Now make them, like, three hundred times bigger and with a penchant for biting passers-by. These giant, creatures lived in subterranean caves, a result of the toxic chemicals with mutating properties discarded by the laboratories above.