An unacceptable lapse in judgment.

If you hunt or fish, you know there are strict regulations for what you can and cannot take from the wild. It's the first thing you check. A professional filming crew for a popular TV show from a major Korean network is expected to do their homework on such basic and publicly available knowledge.

The reason this didn't happen is negligence of the production staff and because of that negligence, protection efforts of an endangered species were compromised.

A big check from Law of the Jungle should accompany that apology.

I noticed that guests don't even know what is edible or not. They would sometimes pick and try to eat unripe fruits and random plants. They usually don't have knowledge of potentially harmful plants/creatures. It's frustrating.
It's either the staff also don't have any idea, which is irresponsible and dangerous, or they deliberately allow it to make the episode fun/interesting, which makes it even worse.
Programs like this should always have a guide/adviser.
And the staff and guests should be briefed about local regulations of the places they go to.