JWST could potentially detect the signature of methyl halide compounds, produced by microbial life in Earth's ocean, on hypothetical hycean exoplanets.

James Webb Space Telescope could find signs of life on alien 'hycean' ocean worlds

Source: space
Source Link: https://www.space.com/the-universe/exoplanets/james-webb-space-telescope-could-find-signs-of-life-on-alien-hycean-ocean-worlds