A Staten Island man was bitten by his poisonous pet snake Friday night and needed to be rushed to hospital.

The 27-year-old man was cleaning a fish tank in his home on Richmond Avenue when a highly venomous Sub-Saharan Gaboon viper attacked him in Graniteville around 10:30 p.m., according to police.

Officials said the man used a fishing knife to cut off the serpent’s head as it was latched onto his arm.

He then called 911 and was rushed to Jacobi Medical Center’s poison control unit where he is listed in stable condition.

Authorities searching the residence also found a boa constrictor and are still looking for more possible critters.

The man could face misdemeanor charges for keeping exotic pets.