Sea Neon, as suggested by the name, resembles a sea creature especially a Jellyfish. Like all Heartless, it has glowing yellow eyes. it's distinct features are two tentacles, a dome protecting its face and several strands of blue towards the back of it.
They mainly rely on weak attacks with hitting characters with their tentacles. Sea Neon's most helpful ability is its agility in Atlantica combined with its ability to be spread from a destroyed Sheltering Zone.
 Journal Entries
 Kingdom Hearts
Heartless resembling jellyfish. They swim fast, and attack in numbers. Overall, they are not tough opponents.
 Kingdom Hearts: Chain of Memories
A jellyfish-like Heartless. It might look laid back, but the Sea Neon's long tentacles can propel it towards enemies for a ferocious attack.