From Bulbapedia, the community-driven Pokémon encyclopedia.
The Water 3 Egg Group (Japanese: すいちゅう3 Underwater 3) is one of the fifteen Egg Groups. Like its counterparts Water 1 and Water 2, it is mostly made up of Water-type Pokémon.
The Water 3 Egg Group is mostly characterized by its members' resemblance to aquatic invertebrates; most are Water types. Despite their lack of resemblance to invertebrates, most Fossil Pokémon belong to this group; Aerodactyl, Cranidos, Rampardos, Shieldon, and Template:Bastiodon are the only Fossil Pokémon which instead belong to other Egg Groups.
It is a relatively small Egg Group. Most Pokémon that are capable of breeding into other Egg Groups breed into the Water 1 Group.
Only in this Egg Group
In this and another Egg Group
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