The campmates took part in the Love Island themed trial to try and win roast dinners for each of the stars.
James and Roman Kemp took on the final challenge in which they had to lie in a bed filled with snakes.
They had to try and unscrew three stars in the blue boxes, which were on James' side and filled with a crab, spiders and cockroaches, and move it to the corresponding yellow box on Roman's side, which were also filled with critters.
The pair had just 90 seconds to try and get the final three stars but didn't manage to complete the task.
How angry did James get? He had a little go at Dec.
James struggled with the first star as a crab was taking up most of the box and as he attempted to move it out of the way, Dec told him to be careful.
After the challenge, Dec asked James: "That was unlucky. What was it James?"
James hit back: "What was it? It was the very fact there was a giant crab in the way that you wanted me to carefully caress in a different direction as I tried to unscrew a star in its face."
Dec said: "Alright someone's getting prickly!"
The incident was also spoken about during last night's episode of spin-off programme Extra Camp.
Host Emily Atack said: "How angry did James get? He had a little go at Dec."
Meanwhile, elsewhere in the live trial, Ian Wright left viewers in hysterics as he continuously burped and gagged after his challenge.
He had to bury his head in a pie which contained slime and cockroaches, but it appeared to get too much for him and he couldn't stop belching.
Later in the trial, Ian had to drink blended pig's penises to win a meal for camp but the beverage left him gagging.
Many viewers found Ian's antics amusing but others weren't impressed.
One said on Twitter: "Can someone please turn off Ian’s mic because I can’t deal with the constant burping."
Another wrote: "Who keeps burping on the live trial on #imacelebrity? It’s disgusting!" while a third added: "The worst part of this trial is Ian repeatedly burping, its making me feel sick."
I'm A Celebrity continues tonight at 9pm on ITV.
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