No one can argue that there is nothing ethically acceptable to kill any animal for the absence of necessity.
Yes it was legal....take the pics and discard the carcass again it is a legal and maybe a subordination of ones hegemonic behaviour. Folks amongst us pay big bucks, travel overseas to quench their social admiration. I am owner operator line commercial fishermen, a commercial diver for 7 years, I will go for a dive with my kids upholding the absence of necessity to harm. Trophy hunting is legal in many parts of the world, contrary to the billions of beings condoning such behaviour. Cecil the lion or Maggie the marlin.....I call out for what it is.