Classic 10404 Building Bigger Thinking Ocean's Bottom

LEGO 10404 Ocean's Bottom is a Classic Building Bigger Thinking set released in 2018, containing 579 pieces and 2 minifigures. It was produced for the 60th anniversary of the LEGO brick and includes a special commemorative tile marking the milestone. The set offers a broad selection of elements—such as wheels, assorted shapes, and eye pieces—plus accessories including a sword and a wizard’s hat. Designed as an open-ended parts pack with underwater-themed inspiration, it supports multiple build ideas rather than a single fixed model.

It was retired in December 2018 with a lifespan of 11 months.