*3.1. Study Area and Specimen Preparation*

*Moorea producens*' specimens were collected from Shimoni (4◦38 55 S, 39◦22 35 E) and Wasini (4◦39 18 S, 39◦22 14 E) on the South Coast of Kenya during 2012 (during neap and low tides) and 2018 (low tide). Specimens were preserved in sterile PTFE bottles prior to storage at −20 ◦C, prior to shipment to the UK (2012) and Germany (2018). Bacteria were isolated from *M. producens* using traditional methods and identified using Gram stain and microscopy in Kenya. At Newcastle University, United Kingdom, and at the Helmholtz Institute, Germany, the bacterial isolates were identified using microscopy and 16S rDNA identification.
