The following p4 c/2 spaceship with a minimum population of 36 cells, which is the smallest known p4 c/2 spaceship. In terms of minimum population, it is tied with the dust mite ship as the smallest known spaceship that travels slower than c, although the dust mite ship has a smaller bounding box. Discovered by glider_rider.

fruit fly ship.png

x = 10, y = 24, rule = s0/b2