They have little life, but appear in mobs. There are larger versions of Squirts, "Elephant Squirts" that can be found that also do more damage and have more life.
Squirts will mill about aimlessly once spawned. Should The Kid enter their view, or if they are attacked, they will speed towards the player. However, the Squirts with green tails are very cowardly, and flee if they so much as see The Kid
All Squirts attack by charging in bursts.