Robert Irwin certainly stirred up the internet last week with his debut in a revealing photoshoot - and today, he's sharing some behind-the-scenes glimpses.

The 21-year-old conservationist - son of the late crocodile hunter Steve Irwin - teamed up with the Australian underwear brand Bonds on Thursday (3 April), a brand that has been around since 1915 and has recently launched in the US.

To celebrate the brand's expansion, the zookeeper and TV presenter participated in a campaign aptly named 'Made for Down Under', which had fans' hearts racing for various reasons.

Not only did he showcase his impressive physique in a series of daring shots, but he also posed with a variety of dangerous creatures - including live snakes and crocodiles - all while modeling the underwear garments.

In one particular photo, Irwin's followers were taken aback when they realized that the tattoo they thought was inked on his left shoulder was actually another critter.

One photo left fans particularly shook (Bonds)

One fan noted after the images were posted on social media: "At first, I thought the spider was a tattoo!"

Another remarked: "I really thought the spider on his arm was a tattoo and not an actual one!"

In a recent update, Irwin has shared some behind-the-scenes photos from his day in front of the camera. Taking to Instagram once more on Sunday (6 April), the star was seen in a dressing room, seemingly flexing his abs and showing off his tan while holding a pair of sunglasses - and notably, no spider in sight.

"Between takes shooting for @bondsaus. #Ad," he captioned the post.

The underwear brand itself commented back: "Living legend - how does it feel to break the internet?"

And judging by the rest of the comments, many of Irwin's fans agree that he indeed did just that.

"Help, I’m endangered & need rescuing," one joked, while another quipped: "American tourists are on the way."

Irwin shared some behind-the-scenes snaps online (Instagram/@robertirwinphotography)

"Bad day to not be an alligator," a third teased.

Irwin previously opened up to PEOPLE Magazine about his decision to join the campaign, stating there was no hesitation in his response when he received the call after the images were released.

"It was a pretty immediate yes," he shared. "I wish I could say I was very suave and cool about the whole thing, but I was like, 'Yes! Let's do it!' Because Bonds in Australia is an absolute icon."

He added: "Also, I'm at a point in my life where I'm trying to embrace as many different and random exciting opportunities as I can, and if it's something that makes me a bit nervous, that I've never done before and it's a bit of an adrenaline rush?

"That's exactly what I want to be doing."

Well, we can't (and won't) argue with that...