Whirly

Whirly, known as Uzurimu (ウズリム) in Japan, is a crab virus in Mega Man Battle Network 5. It moves up and down its column until it rushes into the target's field. It will move along the row until it reaches the same column as its target. When it reaches the same column, it will move towards the target on the same column. After that cycle, it goes back onto its side of the field.

SwirlyEX
SwirlyEX is a purple variant with a blue head.

SpiralyEX
SpiralyEX is a black variant with a black head.

Battle Chips
Aqua Whirl (アクアワール) is the Battle Chip from Whirly viruses.