After the jump, detail on this awesome time lapse photography sequence. Thanks
to FIU undergraduate student Martha Zapata.
We have recently been capturing time lapse video of the artificial reefs at night. Many reef fishes, like grunts, will leave the reef around dusk to forage in the nearby seagrass beds during the night. We wanted to be able to observe the fish on the reefs without influencing their behavior, so we used infrared light (which fish cannot see) to illuminate the reef. The image sequences have shown a stark difference in fish abundance from day to night. Also, we have been able to observe some of the more cryptic organisms that have made these reefs their home. Usually masters of disguise, urchins roam about the surface of the reef. Look out for the banded coral shrimp and crab that crawl up the side of the reef to graze on algae and detritus while the fish are away. Even a moray eel makes an appearance near the end!