Scientists find size is important for the mating of shipworms

Multiple shipworms wrestle for access to a mate (Dr Reuben Shipway/University of Portsmouth/PA)

Scientists have found that size does matter when it comes to the “sexual frenzy” of the mating of shipworms.

Dr Reuben Shipway, from the University of Portsmouth, has filmed for the first time the “wrestling and sparring” as dozens of the worm-like gender-fluid clams engage in pseudocopulation.