Which of the labeled structures in the diagram senses touch,pressure and slow vibrations? 
Definitions:
Goldfish
A common freshwater fish kept in aquariums, known for its bright orange color, which is descended from wild carp.
Sea Lamprey
An invasive, parasitic fish known for its detrital impact on native fish species in the Great Lakes and other fresh water environments.
Welland Canal
A ship canal in Canada, connecting Lake Ontario and Lake Erie, facilitating navigation and trade by bypassing Niagara Falls.
Ballast Water
Water carried in ships' ballast tanks to improve stability and balance, which, when discharged, can introduce invasive aquatic species to new environments.
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