Home›Glossary›BGlossaryboulderEdit this pageA rock with grain size in excess of 256 mm diameter.Used in 373 species profilesAbbottina rivularisAborichthys elongatusAborichthys sp. 'AR01'Aborichthys sp. 'AR02'Acanthocobitis pavonaceaAcanthocobitis sinuataAll 373 →