Eichhornia crassipes
Passive dispersal may also occur via weed on boats and boat trailers and via water pumped from one waterbody to another for industrial and irrigation purposes. In the Nseleni River juvenile "Tarebia granifera" were commonly found with another invasive snail, "Pseudosuccinea columella", on floating clumps of water hyacinth "Eichhornia crassipes" which provide a vehicle for rapid downstream dispersal.