Manu Hissnauer is a divemaster who spends much of his time underwater and is used to encountering all kinds of marine life up close. What he isn’t used to, however, is receiving help from the wildlife, but that’s exactly what happened in this amusing moment.
While completing a task that required no assistance, Hissnauer found himself joined by a curious grouper that seemed determined to supervise his work. The large fish followed him closely, watching every move as the diver continued his task. It was an unexpected interaction, and certainly one he won’t forget anytime soon!
Hissnauer called the gentle giant grouper his new helper, and we’ve gotta admit, it would be kind of fun to get help from a huge fish!
Related: Mother Humpback Whale Gently Helps Diver to the Surface to ‘Help Him Breathe’
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Why Groupers Follow Divers Underwater
Commenter @ahandley00 cracked everybody up when she shared this quick joke about the giant fish: “They don’t call them aloners.”
Dr. Sarah Frias-Torres, an oceanographer and marine biologist who studies goliath groupers, describes them as a curious species that is rarely aggressive toward humans unless they feel threatened or are actively hunting. Divers often enjoy interacting with groupers, which is one reason these gentle giants sometimes approach people underwater.
Dr. Frias-Torres strongly discourages divers from feeding groupers, but these fish have also learned that humans can sometimes mean an easy meal. If a diver stirs up prey like crabs or lobsters, a grouper may take advantage of the opportunity for some fast food. Honestly, who doesn’t like a free meal?
When encountering a grouper, she recommends approaching slowly and from the side rather than head-on. If they feel threatened or overwhelmed, they will quickly swim away. She also advises giving them space, as panicked fish may react unpredictably if they feel cornered, and you could get a strong smack from their tail.
Jupiter Scuba Diving also shared an interesting fact about these massive fish: “Goliath groupers bark underwater as a form of communication—it’s a sound so loud and powerful that you can actually feel the BOOM rumbling in your chest.”
We had no idea either.
This story was originally published by PetHelpful on May 2, 2026, where it first appeared in the Pet News section. Add PetHelpful as a Preferred Source by clicking here.