10.6084/m9.figshare.8143178.v1 S. Neal S. Neal D. M. de Jong D. M. de Jong E. C. Seaver E. C. Seaver Video of C. teleta larval phototaxis from CRISPR/CAS9 mutagenesis of a single <i>r-opsin</i> gene blocks phototaxis in a marine larva The Royal Society 2019 opsin phototaxis Capitella teleta annelid larvae larval behaviour CRISPR/CAS9 genome editing 2019-05-17 08:41:47 Media https://rs.figshare.com/articles/media/Video_of_C_teleta_larval_phototaxis_from_CRISPR_CAS9_mutagenesis_of_a_single_i_r-opsin_i_gene_blocks_phototaxis_in_a_marine_larva/8143178 C. teleta larvae exhibit robust positive phototaxis. Larvae swim towards a directional light source, located to the top left corner, immediately outside the field of view. The light source is a white LED light. Video is at 2x speed.