I'm more on the research side, only do occasional coral collections when we initiate new work on species we are not already growing on exhibit or in the research aquarium.
The collections guys do have a jol though! Especially when collecting the game fish!
Sean - the krill you saw was probably mysid. They use plenty of it in quarantine and culture lab. The lionfish get fed live glassies (they generally don't eat dead or flaked foods) all the bigger fish get store bought seafood, fish health is obviously top concern. They also get their greens! lettuce, garlic, peas, ect. A lot of work goes into the upkeep and animal husbandry here.