Dododex this is affected by a lasso.

When you see this creature, this thing sometimes glitches snd goes in circles around dead fish it kills while its wild. So wait for it to finish circling then feed.

On the islands hidden lake there’s always a few of them. Not only are their eggs good food but every now and then they’ll give you a golden egg. Perfect for leveling if you plant a base at hidden lake. Not to mention they keep that lake clear of piranhas for you! Don’t need to tame just grab the eggs

To harvest organic polymer at a maximum use a club