[1] Enoplochiton echinatus is a very large chiton, with specimen confirmed at length of up to 23 cm (9.1 in).

The plated shell, which often is covered in epibionts like algae, Scurria limpets and Mytilus mussels, has many spines.

These spines are generally up to 0.8 mm (0.03 in) long in large individuals, but can be even longer if not broken, which however is unusual.

[3] The distribution of Enoplochiton echinatus ranges along the Pacific coast of South America from Concepción Province (Punta Tumbes) in Chile to Talara in Peru.

It has radular teeth that are quite large, allowing it to eat heavily incrusted things like coralline algae.