Many people on this forum have tank volumes large enough to keep fairly large animals - like 5-6 ft morays.I'm curious to know what size tank you have yours in? You and others agree that they need to be in house size aquariums. You all so agree that they are hard to re-sell and move tanks, why do you have one then? And really no fish live it's full life and lives up to there full potential in home aquariums.
Many fish live as long or longer under human care. We have many examples of that on the forum.