Batrachedra arenosella, the coconut moth, is a species of moth of the Batrachedridae family found in India, Indonesia, Malaya, and La Réunion, as well as New Zealand and Australia, from the Northern Territory and northern Queensland to New South Wales and South Australia. The wingspan is about 10 mm. Adults' fore wings are speckled brown, and have fringes along the inner margin that are longer than the width of the rest of the wing. The hind wings are narrower, and have fringes along the costa and even longer ones along the inner margin. The antennae are longer than the fore wings.