Hermit crabs are fascinating ... beneficial to a saltwater aquarium. They are outstanding cleaners with captivating behavior and will be the talking point of any reef tank. Urchins aren’t ...

Reefblocks were installed in the Port of Rotterdam’s busiest shipping channel near Rozenburg, creating the modular Rotterdam Reef.

Building on previous research which looked at what crab species would eat juvenile crown-of-thorns starfish in aquariums, scientists went out on the reef and surveyed the crabs and CoTS present.