(Arenosetella indica, Psammastacus acuticaudatus, Leptastacus euryhalinus, Emertonia minuta, Sewellina reductus), ostracods (Polycope sp.), isopods (Angeliera phreaticola), halacarids (Halacarus sp.), insects, and various other species. Marina Beach was also the venue of the 2017 pro-Jallikattu protests. The mass gathering of more than a million people in protest of the ban on the traditional bull-fighting sport Jallikattu at the Marina beach in Chennai for 10 consecutive days turned several eyes on the city's beach from across the nation. The leader-less movement grew much bigger as protests began in other cities across the country and later by Tamils in 15 countries including United States of America, UK, China, Japan and Singapore. The protest came to end only after the ban was revoked after the Prevention of Cruelty to Animals Act, 1960 was amended by the state government to allow the sport. Events Being the most prominent open space in the city, the Marina Beach hosts several events throughout the year. The annual Independence Day and the Republic Day ceremonial parades and airshows are held along the promenade along with the unfurling of the national flag in the Marina. The annual idol-immersion event following the Hindu festival of Vinayaka Chathurthi takes place at the beach where most of the idols of Lord Ganesh kept on display during the festival in the city is immersed into the sea. The event occurs in the month of August–September. The beach is also the venue for several marathon and walkathon campaigns throughout the year conducted for various cause. The beach receives the maximum number of visitors on the Kannum Pongal day, a day in the festival season of Pongal in mid-January, when about 150,000 people come to the beach. The annual Chennai Marathon managed by Chennai Runners is held in the beach starting from the Anna Square to Annai Velankanni Church on the Elliot's Beach in Besant Nagar. It is India's biggest city marathon and is also said to be South India's richest marathon, in which over 1,000 athletes and more than 20,000 people participate, which includes various categories such as a 21-km run for professional athletes, a city run for everybody, a junior run for children, a master's run for senior citizens and a wheelchair run for the disabled. From 2016, the Marina Runner Marathon managed by Marina Runner Running Group is held every year in the last weekend of February, this event prides itself on promoting