About the Species
The oceanic blacktip shark (separate from the blacktip reef shark) is a coastal shark that occupies tropical and subtropical seas. They usually reside within the first 30 metres of the water column. They are commonly spotted in estuaries, mangroves, river mouths, and bays, as well as coral reef drop-offs and within continental shelves. They feed on a wide assortment of bony fish, keeping many populations in check, and playing a crucial role in marine ecosystem maintenance.
Biology
Physical Traits
- Blacktip sharks are normally two metres in length and are distinguished by their slender, streamlined bodies, pointy snouts, and smaller eyes.
- They acquired their name from their peculiar black colouration at the end of all of their fins (excluding their anal fin, which is white). The colouration of the rest of their body customarily transitions from a grey-brown colour on top of their body to white colour on their lower belly.
- They accommodate 15 rows of teeth, backed by a constant supply of replacements.
Reproduction and Lifespan
- Oceanic blacktips are viviparous (bear live birth). Although they have longer gestation periods (11-12 months), they give birth to live young that are born fully nourished, developed, and ready to take on the world, with little to no time or resources spent by the mother nurturing young after they are born.
- Birthing grounds are typically characterised by warmer, shallower waters to ensure safety.
- Males reach maturity earlier than females (4-5 years compared to 6-7 years), and females give birth every other year to litters ranging from one to ten pups.
- Blacktips have a relatively shorter lifespan, with a max of around 12 years.