At first glance, it might seem like the birds and the bees have nothing to do with the sustainability of sharks or sardines. But it turns out that how often and how early marine animals have sex — and how many babies they produce from their trysts — have a big bearing on whether or not these species hit the sustainable seafood mark. In this video, learn why the leisurely sex lives of orange roughy and dusky sharks land them on the no-eat list.
Produced and edited by Melissa Forsyth