The new ink featured a long vine with leaves on both sides running down her spine from the top of her neck to her lower back.
"Who says I'm not a mermaid," she wrote, including a mermaid emoji.
Berry, 52, was wearing a shimmering, mermaid-colored sequin skirt, while standing in front of a stove. She appeared to be holding a skillet above the fire on her right hand and an egg on top of her head with her left hand.
The "Cloud Atlas" star also posted the risque photo on her Instagram story — that version was decorated with cartoon jellyfish and corals on the bottom corners.
It's unclear when Berry got the impressive vine tattoo.
The Oscar-winning actress skipped out on the Academy Awards this year, but attended the Costume Designers Guild Awards (CDGA) on Feb. 19 sporting a low ponytail that covered her back. This sparked speculation that she might've already had the tattoo then, but skillfully hid it with her hair and strapless golden gown.
Berry presented the CDGA Career Achievement Award to Ruth E. Carter, with whom she worked with on her first-ever film "Jungle Fever."
The X-Men star will play an assassin and friend of John Wick, played by Keanu Reeves, in the film "John Wick: Chapter 3 - Parabellum," which will release nationwide on May 17.