A dragon, a yeti, and a lobster make up the other Water creatures.
Gill Grunt might be the Water type that most players use, but Zap is the other available Water type. Slam Bam and Wham-Shell, in all their -am glory, are currently unavailable.
Raised by electric eels, Zap is a dragon who can use water and electricity to nullify his foes. Along with electrical water surges and lightning bolts, Zap can also leave behind a trail of water that becomes an electrical current if anyone walks in it.
Slam Bam is a four-armed yeti. Awesome, right? It gets better. He surfs and eats snow cones. Also, he uses his four arms to beat up baddies.
Wham-Shell is a mace-wielding lobster who is angry that his home was attacked by trolls looking for oil. So, his fierce battle tendencies are justified.