Interesting new training does indeed involve
nocturnal outings - I just did a night dive for my Advanced Open Water certification, my last dive for that. It was great to see the sleeping fish and how one is able to get close, and also all the different sealife that doesn't venture out during the daytime hours - lots of crustaceans.
Nocturnal:
Nightfall obviates crustacean
taciturness, usually revealing new animal life.
Batray, El Niņo is starting up again, will that cool the waters where you dive?
Mishu - once you get started it's alot of fun.
Adrian