The Lil'Kinz Seahorse was released in December 2008, wasn't Pet of the Month, is an underwater pet, isn't retired and doesn't have a webkinz version. Its special item is the Bright Light Sea Lamp and its special food is the Teeny Tiny Shrimp Dumplings.
What lives underwater, has a curly tail, and likes to eat shrimp? If you guessed a Seahorse, you're right! In Webkinz World, a Seahorse is happiest when hanging out in their underwater room, playing arcade games, or learning some new skills at the Kinzville Academy. If you want a unique friend, pick up the Seahorse!