Related Experiment Video
Updated: Dec 20, 2025

A Protocol for Bioinspired Design: A Ground Sampler Based on Sea Urchin Jaws
Published on: April 24, 2016
Choosing trash instead of nature: Sea urchin covering behavior
Francisco Barros1, Daniel Santos1, Alice Reis1
1Laboratório de Ecologia Bentônica, Instituto de Biologia & CIENAM, Universidade Federal da Bahia, Rua Barão de Geremoabo s/n., Campus Ondina, CEP 40170-115 Salvador, BA, Brazil.
Abstract:
Notwithstanding impacts of marine debris on fauna by ingestion and suffocation, little is known about debris-related behavior. Lytechinus variegatus is a common sea urchin known for its covering behavior. We hypothesized that L. variegatus would select more marine debris (i.e. litter) than natural material as cover and we also expected that the selected natural and artificial material would be different in weight, sizes and transparency. We haphazardly collected marine debris and natural material on 20 individuals of L. variegatus and on the bottom, around each individual. All sampled material was weighed, measured and classified regarding opacity, nature (natural or artificial). Our results showed that i) sea urchins picked more litter than natural objects, ii) proportional weight of litter carried by urchins was significantly larger than expected by chance, iii) when considering all objects (on urchins and on the bottom) litter was heavier, wider and less opaque than natural material and iv) litter carried by the urchins were wider and less opaque than natural material. We suggest that litter can influence urchin's protection against sunlight, camouflage and ballast and that sea urchins with covering behavior might be used as indicators of marine debris in coastal and deep waters.
More Related Videos
13:18Data Collection on Marine Litter Ingestion in Sea Turtles and Thresholds for Good Environmental Status
Published on: May 18, 2019
07:34The Power of Simplicity: Sea Urchin Embryos as in Vivo Developmental Models for Studying Complex Cell-to-cell Signaling Network Interactions
Published on: February 16, 2017
Related Concept Videos
Optimal Foraging
Keystone Species
Naturalistic Observations
Instinctive Drift
Types of Selection
Habitat Fragmentation