In this episode of Pod Diver Radio, we head to a snowy Boston, Massachusetts to splash into the Giant Ocean Tank at the New England Aquarium. Dive Safety Officer John Hanzel takes us behind the scenes of this 200,000-gallon Caribbean reef exhibit—home to sand tiger sharks, green morays, and the legendary Myrtle the turtle. We talk about how the system is plumbed from Boston Harbor, how the fish are hand-fed underwater, and what it's like to be "on display" as a public-aquarium diver. Then we jump to the DEMA show floor to talk with Randy Klein Gross of Titan Dive Gear about modular dive light systems. Randy explains their Hydro Lights, self-contained vs canister setups, burn times, LEDs for tech and cave divers, and how the same battery packs can power both primaries and video lights. Finally, we sit down at DAN HQ in Durham, North Carolina with Dr. Petar Denoble to unpack a major Divers Alert Network study on deaths in diving. We dig into real root causes: gas management and emergency ascents, arterial gas embolism, entanglement, buoyancy issues, and the growing role of cardiac events in older divers. Dr. Denoble shares practical takeaways on fitness, annual medicals, refresher training, and why skill maintenance matters just as much as new gear.