Oyster oscillator: a novel mega-stable nonlinear chaotic system Balamurali Ramakrishnan, Atefeh Ahmadi, Fahimeh Nazarimehr, Hayder Natiq, Sajad Jafari and Iqtadar Hussain Eur. Phys. J. Spec. Top., 231 11-12 (2022) 2143-2151 Published online: 24 December 2021 DOI: 10.1140/epjs/s11734-021-00368-7