SeaLife ReefMaster RM-4K Underwater Action Camera

FGSS lists the SeaLife ReefMaster RM-4K Underwater Action Camera here as an Amazon-affiliate pick from SeaLife. Waterproof housing rated to 130ft/40m, removable inner camera. Standard 1/4-20 mount compatible with SeaLife's own Sea Dragon lights and lens accessories. 4-button control system, built-in moisture-absorbing capsule to prevent internal fogging. This is built specifically as a modular underwater photography system rather than a general-purpose action camera -- the standard mount and expandable lens/light accessories are the real differentiator versus the GoPro-style cameras also in this batch, which are more of a closed system. Heads up: this listing checks out on Amazon, not through FGSS directly. We're an Amazon Associate, so a qualifying purchase here earns us a small commission -- it doesn't change your price. Worth a look at FGSS's own Underwater Camera Gear collection too, if that's relevant to what you're after.