Here's why:
* They are simple creatures: Sea monkeys are not complex like insects or mammals. They lack the physical capabilities and instincts to construct structures.
* Their habitat: They live in a watery environment where building materials are not readily available.
* Their behavior: Their main activities are swimming, eating, and reproducing. They are not known for any form of construction behavior.
The idea that sea monkeys build things might come from the kits they are sold in, which often include decorative accessories like castles or seaweed. However, these are just decorations, not things the sea monkeys themselves create.
Sea monkeys are fascinating creatures in their own right, but they are not known for any building skills.