Martynia arenaria wani nau'in tsiro ne na dangin Martyniaceae. An san shi da sunan rairayin bakin teku Martynia ko katsin cat. Tsiron ya fito ne daga Amurka kuma yana girma a cikin yashi a bakin teku. Ana amfani da 'ya'yan itacen Martynia arenaria don abinci da magunguna a wasu al'adun gargajiya, kuma a wasu lokuta ana shuka shuka azaman kayan ado.
