Required for cell migration and engulfment of cell corpses but not for programmed cell death/apoptosis. Also has a role in the migration of the 2 gonadal distal tip cells (DTCs) (By similarity). Interacts with ced-5 (via C-terminus which contains a candidate SH3-binding, proline-rich region). Forms a ternary complex with ced-5 and ced-12. Interacts (via SH-2 domain) with src-1 (when activated and phosphorylated at 'Tyr-416'). Belongs to the CRK family.