Aquarius paludum is a species of pond skater in the family Gerridae.

[2] Aquarius paludum is found across England and Wales, and is one of the larger species of pond skater there.

It can be found at ponds, rivers, lakes and streams mainly in South East England.

The difference between the two is that A. paludum has large, upward facing spines that go all the way down to the tip of the abdomen and a yellow line on the side of the pronotum.

[3] Another similar species to the two is Limnoporus rufoscutellatus, a pond skater that is not in the same genus that is established in Ireland but is rare in Great Britain.