Enables actin filament binding activity. Predicted to be involved in actin filament organization and muscle contraction. Located in cleavage furrow; cytoskeleton; and growth cone. Is expressed in coelomic epithelium of testis; ovary; and primary sex cord. Human ortholog(s) of this gene implicated in congenital fiber-type disproportion and nemaline myopathy 1. Orthologous to human TPM3 (tropomyosin 3). [provided by Alliance of Genome Resources, Apr 2022]