A Florida homeowner got the shock of his life after spotting a crab armed with a blade swiping at him and his pet dog.

Eduardo Alvarez shared a video of the bizarre encounter on Instagram with the caption 'Florida is getting out of hand.'

Footage showed his dog Summer sniffing at the crab before jumping back as the crustacean flashed its blade.

'Dude, are you kidding me right now?' he said.

He then turned the camera to Summer and said: 'Where the heck did you find a crab with a freaking shank?'

Alvarez then tried to pick the crab up but it swung at him. He managed to carefully get a hold of it and took it into his backyard. 

'Summer, I dont recommend messing with this,' he warned his dog.

'This is like a gangster-a** crab.'

Florida is home to many crab species and residents often spot them near their homes.

The viral video grabbed attention on social media, gaining 653.5K likes on Instagram.

Viewers of the video shared their thoughts online about the dramatic moment. 

'Yeah, we grow them mean in Florida,' commented a user. 

Another said: 'We got crabs wielding weapons before GTA 6.'

While many enjoyed the hilarious video, some people claimed it was fake.

A person commented: 'Did he manage to take the knife? I thought it was stuck on his claw.'

A similar video from 2016 appearing to show a crab holding a knife was proven to be a hoax.

Jack Cover from the National Aquarium in Baltimore told The Washington Post: 'It's a hoax,' and that the crab is 'absolutely distressed.'

Cover had said that if the knife was taken out of the equation, there was nothing strange about what the crab was doing.