**3. Materials and Methods**

*Limnoraphis* sp. CCNP1324 was isolated from the Puck Bay in the Southern Baltic Sea (54.45 N, 18.30 E) by Dr. Justyna Kobos in 2012. The strain was obtained from the Culture Collection of Northern Poland (CCNP) at the University of Gda ´nsk and grown in F/2 medium (7 PSU), at 22 ◦C ± 0.5, with constant illumination (10 μM photons m−<sup>2</sup> s<sup>−</sup>1) provided by standard cool white fluorescent lamps.
