Halfshell
- Halfshell is a Predacon space pirate in the Beast Era of the Generation 1 continuity family.

Halfshell leads the Seacon Space Pirate band in their quest for treasure across the cosmos. His primary goal -- money. Secondary goal -- money. Shrewd and calculating, he looks at everything in relation to how he can profit monetarily from it or how much something will end up costing him. While many expect that this would make him a cold-sparked sort who'd sell out is teammates for a big enough profit, nothing could be further from the truth. Halfshell takes friendship seriously, and is downright generous towards his friends, be they Maximal or Predacon. And if you have Halfshell for a friend, you've got one big bruiser on your side.
Halfshell combines with his fellow Seacons to form God Neptune.
Fiction
Beast Wars II Cartoon
Voice actor: Kazuhiko Nishimatsu (Japan)

Beast Wars II Manga
IDW Beast Wars comic continuity
Halfshell is seen fighting Guiledart in Magmatron's astral voyage to the future. His impaled corpse is later seen on Cybertron's ruined surface in the presence of Shokaract. The Ascending, Part 1
Toys
Beast Wars II
- God Neptune (Ultra, 1998)
- Japanese ID number: D-21
- Available only in a five-piece Ultra-level multi-pack with his teammates, Halfshell transforms into a mechanical tortoise, a redeco of the Generation 1 Seacon Snaptrap. A lever on his back makes the large cannons over his beast-mode head move back and forth in a "pom-pom" reciprocating motion. He forms the torso of the combined mode God Neptune, but since the mold uses the Scramble City style of combination, he can use any limb-robot of similar construction. Halfshell lacks the large rifle from the original release of the mold, however.
- For unknown reasons, a great number of unboxed God Neptune sets --lacking all of their accessories, including combiner parts-- ended up available on the secondary market. These went for considerably less than the "complete" releases, naturally.
- This mold was also used to make Turtler. It was also slated to be released as Energon Snaptrap, as part of an exclusive Piranhaking multi-pack that as of now remains unreleased.
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