 
 <prompt> Hydrogen sulfide wey dey come out from hydrothermal vents no too good because e no dey ideal. <response>: Gut dey like straight tube wey mesenteries dey support, and e end with anus for underside of pygidium. But for members of Siboglinidae family wey dey live inside tube, gut dey block with swollen lining wey get symbiotic bacteria wey fit make up to 15% of worms total weight. The bacteria dey convert inorganic matter like hydrogen sulfide, carbon dioxide from hydrothermal vents, or methane from seeps to organic matter wey dem and their hosts dey chop, while the worms dey extend their palps into the gas flows to absorb the gases wey the bacteria need. 