Mumbai-based researcher Nikit Surve was in for a pleasant surprise when he encountered a cluster of blue buttons, officially known as propita propita, at Gorai beach on Friday. The marine animals resemble jellyfish and are usually found in tropical and sub-tropical waters of the Pacific, Atlantic and Indian Ocean.

Speaking to mid-day, Surve, a biologist, said, "I was amazed to see these beautiful blue-coloured creatures. So, I clicked a couple of pictures and sent it to Jessica Luis, a marine expert, who helped identify them." Surve says this incident is testament to our rich biodiversity, and therefore it's imperative that we preserve our beaches and coasts. "Vehicles should be completely restricted as they pose a huge threat to marine life.