crabs are literally being forcefemmed by barnacles every day and no one ever talks about it
sacculina makes me go a little insane honestly and not even for strictly transgenderly reasons... its life cycle involves attaching itself to a crab, producing eggs in place of that crab's eggs, and using the female's natural "egg dispersal" technique to, well, disperse its own eggs; but what do they do if they attach to a male host? give up and die? of course not, they simply instigate a hormone cascade that fundamentally changes the crab forever. easy!
and this is just what being an arthropod is like most of the time. bugs get parasitized like CRAZY. theyre the worlds most hijackable machines and you better believe the biosphere is taking advantage of that fact
and, sure, you know what, its yuri. fuck it. theyre raising kids together. this is the ideal liberal family: barnacle mother, absentee barnacle father, and beautiful transgender crab mother