If you're going to be doing any ocean fishing, then you will want to get a saltwater fishing reel. These reels are made to stand up to the rigors of the elements that are encountered with ocean fishing. Salt can destroy a reel fast. Saltwater fishing reels are much more durable than a freshwater reel and in general are larger as well.
You couldn't land a 75lb marlin on your typical Zebco fishing reel. I would not hold the the string size or weight in the string casing. Saltwater reels require much stronger line strength and larger spool to accommodate the line and yardage needed if the fish should run on you. It has taken many a Fisherman more than an hour to land a saltwater variety fish. Talk about a good work out!
There are lot of different Saltwater reels to choose from. Below you will find saltwater reels listed to buy right now for for auction at really good prices. Check them out and see if any catch your eye.
Below are the current listings on eBay. If you see one that appeals to you bid on it or type what your looking for into the search bar and you will be shown those items that are available right now on eBay.