A few years back I created some 3D printable models using Blender 3D for the Harte research institute at Texas A&M at Corpus Christi. I believe these models were used for science education in mind
Kinkinorhyncha
kinorhyncha
Harpacticoid
Trichobranchidae
Nematode
Ostrocod
Amphidpod
Amphipod
Serpulid
Nereidae
Syllidae
Spionidae
Barnacle