LEGO 31158 Sea Animals – 3-in-1 Underwater Build, 421 Pieces

Three underwater adventures in one LEGO Creator set

Bring a bright, action-packed undersea world to life with LEGO 31158 Sea Animals. This 421-piece collection invites kids aged 8 and up to build, rebuild, and display a colorful ocean habitat featuring two fish, a turtle, a jellyfish, a seahorse, and a red crab perched on a seafloor stand adorned with sea plants. The sea creatures sit on transparent rods, so poses feel playful and kinetic, while the seafloor stand can be straightened or angled to shape each scene.

The 3-in-1 design delivers three distinct builds from one brick set, encouraging experimentation and storytelling without needing new parts. Start with a lively six-figure underwater tableau, then reconfigure into an octopus and squid beside a bubbling volcanic rock, or place two fish weaving through vibrant sea plants. Each model invites kids to explore different narratives, swap roles among sea creatures, and imagine new adventures as stories unfold.

What you get

• 421 pieces to create 3 different sea-scene builds
• 2 fish, a turtle, a jellyfish, a seahorse, and a red crab figure
• Seafloor stand with sea plants and transparent display rods
• Modular stand that can be straightened or angled for varied displays

Build, display, and expand

• Swap the positions of the sea creatures on the rods to customize scenes
• Three build options from a single brick set, with potential for bigger adventures when combined with other LEGO Creator sets
• Promotes imaginative play, storytelling, and hands-on building—great for desk or shelf display

Beyond the first play session, the set works as a mini gallery: kids can curate different underwater layouts, try new poses, and coordinate with other LEGO Creator 3-in-1 sets for extended storytelling. The bright colors, varied scales, and mix of transparent and solid bricks all contribute to a visually engaging project that looks appealing on a kid’s shelf or desk. While results may vary, the options invite creativity, experimentation, and repeated building sessions that can evolve with a child’s imagination.

Gift-ready idea — this 3-in-1 set is a thoughtful birthday or holiday gift for budding builders who enjoy role play, exploration, and creative display. The flexible, repeatable design helps keep play fresh and can grow alongside a child’s interest in ocean life and diorama-style scenes.