The nearest underground tube stations are Westminster and Waterloo.
Westminster tube is on the Circle, Jubilee and District lines. From Westminster, exit onto Westminster Bridge (Exit 1) and then cross over the Bridge. SEA LIFE London is visible from the bridge.
Waterloo tube is on the Northern, Bakerloo, Waterloo & City lines. From Waterloo follow the exit signs for the South Bank (Exit 6) and walk towards the Coca-Cola London Eye. SEA LIFE London is in County Hall, next to the Coca-Cola London Eye.
For more information visit the Transport for London Journey Planner website.