1。 Yes, because only from April 2 to April 9, when you make crystal shrimp in Happy Restaurant for the first time (note that it is the first time), can you get a free Miss Mermaid.

2。 Ladies don't mutate.

3。 Generally, there will be variation the next day. Your question is unclear and you can't answer it in detail.

4。 If the change of the night pearl is a mistake, feed the fish food card once and you will know what it will mutate into. If a mermaid cooks, it won't mutate. Don't worry until she grows to full weight, just pay attention to prevent others from electrocuting her with monster+electric fish device ~

Miss, you can be dissatisfied with the weight, but it is recommended to change it when it is full, because the four mermaids will not disappear in your warehouse after you change the princess. If you are dissatisfied with the weight, it is not worth collecting. You can use fishermen to collect, fish and seduce (but some people can't change, I don't know what happened, but I changed anyway).

If you don't understand, you can join the Xin Kai official forum group: 39675526 (I'm in it, and there are many experts in Xinkai).