Females release lipid rich eggs which float slowly upward. Males release sperm bundles that contain hundreds of sperm cells. The sperm bundles then swim up to meet the eggs where they are fertilized. The larval worms swim down near the hydrothermal vents and attach to the cooled lava where they grow to form new tube worm communities. (Cary et al. 1989, Univ. of Delware Marine Studies 2000)
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