Sea-Tron

Sea-Tron is an unreleased LEGO Space toy line developed during the late 1980s through the early 1990s. Its concept eventually led to Aquazone. Other unreleased products in the same theme concept include Sea People and Aquadome.

Concept

Sea-Tron was developed around 1990. It was one of the last of many LEGO Space lines headed by Jens Nygaard Knudsen through the 1980s. The Sea-Tron setting would have been a water-covered alien planet and would have featured both spaceships and underwater astronauts. One potential Sea-Tron set included the LEGO monorail system that Knudsen had co-developed with Peter Bolli; the set would have featured a monorail track and station designed to simulate the train traveling in and out of the water.

Following Sea-Tron, a similar concept, Sea People, was developed in the early 1990s. For this line, Niels Milan Pedersen designed a fish-like alien minifigure that featured a unique head, sculpted scales, webbed feet, and a spinal fin. These were one of a number of alien designs created for LEGO Space since the start of M-Tron's development; however, the management at LEGO felt that it was not the right time to introduce aliens. Several prototype Sea People figures, commonly referred to as “Sea-Tron aliens”, have made their way into the public and have become extremely rare collector's items.

In 1993 development began on Sea-Tron's successor, Aquazone, which went on to release in 1995.