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| A shark egg (bet you've never seen them before) |
- There have been cases of sharks reproducing asexually through parthenogenesis
- The whale shark (Rhincodon typus) is the largest fish in the world
- Younger whale sharks are actually quite gentle and can play with divers
- A group of sharks is called a gam, grind, school, herd, pod, collage, or shiver.
- Shark don't have bones; they have cartillages
- Some sharks can survive in freshwater.
- Some sharks lose 30,000 or more teeth in their lifetime (read further why)
- The earliest known sharks date from more than 420 million years ago.
- They range in size from17 centimetres (6.7 in) in length, to approximately 12 metres (39 ft), depending on the species
- There are two documented cases where female sharks who has not been in contact with a male conceived an offspring. However, It's considered a last-ditch effort as it diminishes genetic diversity. Asexual reproduction may have contributed to the blue shark's decline off the Irish coast
- The whale fish, although the biggest species of fish known today, feeds on algae, plankton, krill, small squids, crab larvaes, and other small organisms.
- Shark species that can survive both in freshwater and saltwater are bull sharks and river sharks
- Sharks have rows of teeth that keeps growing forward with the front row ones falling off. Depending on the species, the replacement could take 8 to 10 days to several months. Although, the teeth are replaced one at a time instead of simultaneously
- It is estimated that 100 million sharks are killed by people every year, due to commercial and recreational fishing.
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