Black Skin Knife isn't a common fish, and Chu Mingcheng had only read about it on Wikipedia, not knowing its taste.
So he brought over a box, scooped some crushed ice into it, and put the fish in the box to keep it fresh with ice.
They would try one tomorrow, and then decide how to handle this type of fish.
Uncommon fish usually don't have a set market price, so if the taste is excellent, he could set a slightly higher price himself.
If the taste is mediocre, he could chop up the Black Skin Knife caught tonight and feed it to the fish and shrimp in the live water tank.
Having been out at sea for so many days, if he let these fish and shrimp starve, some would definitely thin down or even die; feeding them a bit every two days was necessary.
However, these sea creatures weren't easy to keep alive; every day, some couldn't hang on and would perish, forcing Chu Mingcheng to scoop some up every other half day.