The seasonally elevated seawater temperatures have affected the behaviour of our Clownfish, with no eggs produced this month by either the Maldivian or Clark’s breeding pairs. However, our Common clownfish (Amphiprion ocellaris) continued to lay eggs, but each batch was consumed within a few days (maybe related to the high water temperatures). All our clownfish juveniles (49 Clark’s and 3 Common) are healthy and continue to grow, and have shown no adverse effects.
May has seen a large fluctuation in the number of Rotifers produced, alongside some contamination issues. Bucket-A was shut down due to a sulphur bacterial bloom. Despite daily cleaning, coupled with 2 deep-cleans with a 80µm filter, the majority of the Rotifers did not survive. The volume has therefore been reduced to 15 litres (Bucket-B). To facilitate survival of the remaining Rotifers, they have been fed with 2 litres of algae every 2 days, after washing. This has proved successful, yielding an overall population density of 278/ml at the month’s end. 1l of rotifers has also been added to a 100l algae bucket to replenish the depleted stock.
Artemia production continues to go well, providing food for our juvenile clownfish, jellyfish polyps and the main display tank. Day-2 Artemia were also added to a 100l algae bucket to provide larger food for the sea horse and our larger fish specimens.