1. A basking shark was spotted off Cardigan Bay recently. How big can they grow?
2. And how wide can their mouths open to catch plankton?
3. Also in Cardigan Bay, a Thresher Shark leapt from the water. How high can they jump?
4. Huge shoals of whitebait have been washing up across North Wales. Which fish is a typical predator for whitebait?
5. Fin whales were seen herding fish to the surface in the Celtic Deep. How far can they dive beneath the water?
6. How long do they dive for on average?
7. A sperm whale washed up on North Wales earlier this year. What was the reason, according to marine experts?
8. What is the average size for a mature sperm whale?
9. A giant jellyfish washed up across the water from Barmouth. What drew it inshore?
10. An orca was spotted off Criccieth Beach. How heavy was the largest ever recorded?
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