This past weekend we had a great time sailing on saturday and even with a reef we were getting the rail in the water some of the time. Sunday started out good but we had to shake out the reef and then slowed to only 1-2 knots. We motored to get out into the gulf hopeing for some wind. The gulf was lumpy and there wasn't much wind but we flopped and drifted around at 1-2 knots hopeing for some wind.I saw a large dark shape in the water and said "dolphin" to my wife. But after a few moments it became clear that it wasn't a dolphin. We changed direction a little and saw that it was a huge leatherback turtle!!!! Must have been 5' long and weighed a 1000#s. He wasn't afraid of the boat and we watched him for a few minutes. On the way back to the jetties we passed him again and this time he was close and we actually saw him eat a jellyfish. We saw another smaller one as we got close to the jetties. The wind finally arrived and we sailed at 3-4 knots back to our bayou.I've seen loggerheads several times while sailing or diving but these were the first leatherbacks. How common is it to see a leatherback??? Anyone see them??Thanks Tom