I'm suppose to edit the following sentence by adding either a semi-colon, colon, dashes, or an hyphen where it is needed. I think a semi-colon go behinh creatures.
If your kids like ocean creatures marine life, there’s something they have to see.
Since "ocean creatures" and "marine life" mean about the same thing, it is an awkward sentence no matter how you punctuate it.
If your kids like ocean creatures -- marine life -- there’s something they have to see.