Trokofor
caption: Anatomi trokofor A - episfer B - hiposfer 1 - ganglia 2 - apical tuft 3 - prototroch 4 - metatroch 5 - nefridium 6 - anus 7 - proto nefridia 8 - saluran gastrointestinal 9 - buccal opening 10 - blastocoele
caption: Bright-field microscope image of trochophore of annelid Pomatoceros lamarckii (family Serpulidae )