well mullet can be many thingsm i mean there is red mullet and grey mullet. both some of the best fish around, yet not related at all.
the fact that you thought it was the best lobster you'd had surprises me. i work a lot with the michelin star resteraunts and kitchens in london, whenever a customer goes wild and said i want that big mother fucker right there, it's all siles and good choice sir good choice, but moment the customer is gone, the entire kitchen will just start laughing their faces off that someone has just ordered a 5lb lobster for £120, we all find it absolutely hilareous, at that size the flavour and texture tends to be plain wank, certianly still lovely, but wank in comparison to a sweet suculent 800g job.