Swim Speed Up

 is an ability in and. Krak-On gear has a 5× chance of rolling this ability.

increases movement speed while swimming in squid form. Like Run Speed Up, this ability comes in handy during the opening moments in a match when players are heading toward a stage's center. It is especially useful in Ranked Battles as players need to get to a certain place quickly.

Splatoon
increases movement speed while swimming in squid form and Kraken form by up to 25%.

Use
This ability makes it easier to chase enemies with the Kraken.

Gear
is the main ability of:

Splatoon 2
The effect of Swim Speed Up depends on the weight class of the player's equipped main weapon. It increases swim speed by up to 20% for players with lightweight weapons, up to 25% for those with middleweight weapons, and up to 38% for those with heavyweight weapons.

The ability can be used to nullify speed penalties from weapon weight and by using the amounts shown in the following table.

Gear
Swim Speed Up is the main ability of:

Stacking
The table below shows how much Swim Speed Up increases swim speed with the different weight classes.