We gave our large 4000L display aquarium a deep-clean during November. Debris was removed from the base, the three pumps were cleaned of accumulated CCA and algae, and any dead corals were removed, replaced and rearranged.
- Algae supply remains good, on a consistent and successful cycle.
- Artemia production is keeping up with the demand of the main tank, at 6g of cysts a day. Production has moved outside, and the new batch of cysts are hatching more successfully than the previous batch.
- Rotifer volumes remain consistent and stable, despite a slight dip in the middle of the month.
Jellyfish – Aurelia aurita
Unfortunately, during a water change this month, there was a loss of jellyfish from the small Kreisel tank. The survivors have since recovered and are doing well. In the main display cylinder, all specimens are healthy and growing (no signs of shrinking) and the new UV steriliser is working well.
Zooplankton Survey Study
As part of our Zooplankton Survey, our new closing plankton net has arrived and is being trialled. There are several modifications that need to be made to the net for it to work effectively.
Our most popular guest excursion by quite a margin is the Dolphin Cruise, followed by the Turtle Safari, and we ran the full range of tours this month (Guided Adventure Snorkel, Shark Safari, Marine Life Safari).
Participation totals for November were 140 guests at Kuda Huraa, and 210 guests at Landaa Giraavaru (which includes Landaa’s popular Marine Discovery Immersion Tour).
During November, we recorded an in increase in tiger shark numbers, with several exciting encounters at quite close range (5m, rather than the more usual 45m distance).