Tube wyrm are serpentlike creatures that live on the ocean floor. Occasionally, naga capture and train tube wyrm to serve them as defenders (particularly in Nazjatar), though this strategy is not widespread. Naga refer to these tamed tube wyrm as tidal guardians.
Tube wyrm thrive in heated, sulfur-rich, acidic waters. Heated gas emerges from thermal vents in some areas, and tube wyrm consume this gas and convert it into nutrients. One such area is the Pillar Deep, in the Eye. On first sighting this area, an undersea explorer sees enormous pillars rising from the ocean floor. Closer inspection, however, reveals that these "pillars" are tube wyrm, grown to enormous size in these rich waters.
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