Chaetognaths swim in short bursts using a dorso-ventral undulating body motion, where their tail fin assists with propulsion and the body fins with stabilization and steering. Muscle movements have been described as among the fastest in metazoans. Muscles are directly excitable by electrical currents or strong K+ solutions; the main neuromuscular transmitter is acetylcholine.
Chaetognaths swim in short bursts using a dorso-ventral undulating body motion where their tail fin assists with propulsion and the body fins with stabilization and steering Muscle movements have been described as among the fastest in metazoans Muscles are directly excitable by electrical currents or strong K+ solutions; the main neuromuscular transmitter is acetylcholine