Too much motion sickness

My husband and I wanted to do something very unique for our honeymoon in Hawaii so we decided to do Shark Encounters! We were both very excited to do this. On the day of, we drove up to the northshore at 430am because we booked the 6am group. On arrival, the staff were very friendly & knowledgable. However, my husband and I were motion sick the whole entire time that we were out at sea. We did not enjoy this at all. We even took gravol to control our motion sickness but it did not work. When we got into the cage to see the sharks, we were still having motion sickness. It was nice to see the sharks close up but it felt like we were sick the whole entire time. Overall, it was an experience that we would never do again.