Yes, but there's a problem. This is not the magic we need. Seriously, a Sea Witch doesn't need a magical gift. on the contrary, it goes well with the Succubus and Priest build. A magician can also benefit from this race, but essentially, magical powers are not needed to use the abilities of the Sea Witch. It's more like the Kekengai from Naruto than supernatural science. In addition, the abilities of the sea witch are only available to the Sea Witch, and this is NG+.
Sea Witch doesn't need magical powers. She can be a Succubus, Warrior or Priest if she has high enough wisdom. The problem is that the magician has no magical trump card. We are talking about people with very high intelligence who managed to successfully survive in a not very friendly world.