Indo-Pacific Bottlenose Dolphin (Tursiops aduncus) lives in tropical coastal waters across Indian and Pacific Oceans. Its conservation status is Near Threatened.
Fascinating facts about the Indo-Pacific Bottlenose Dolphin
- At just 2.6 m (8.5 ft) long and 230 kg (510 lb) heavy, the Indo-Pacific bottlenose dolphin is the smaller cousin of its Atlantic relative, yet it packs up to 29 teeth on each side of each jaw, far more than the 21-24 teeth typical of the common bottlenose. Newborn calves arrive at 0.84-1.5 m (2.8-4.9 ft) length.
- Scientists only split the Indo-Pacific bottlenose dolphin from its global sibling in 1998, after decades of lumping them together as T. truncatus. mid-Pleistocene divergence, roughly one million years ago. the two species now show longer rostra, different spot patterns.
- A stomach-content study off Zanzibar uncovered a menu of 50 bony-fish species and three squid species, with fish making up 87% of all prey items and appearing in 24 of 26 examined stomachs. Cephalopods supplied the remaining 13%, showing up in 13 of the 26 stomachs.
- Dolphins tune their whistles to the soundscape around them. In quieter habitats they emit highly modulated, higher-frequency whistles, while noisy waters force them to lower the pitch and simplify the pattern. Researchers concluded that ambient noise can drive whistle variation across populations, showing that these mammals actively adapt their communication to avoid masking, an essential skill for staying in contact in bustling coastal zones.
- In Shark Bay, some dolphins have turned sea sponges into handheld tools. A dolphin will snap a sponge off the seafloor and wear it over its beak, using the soft filter to probe the sand for hidden fish. This "sponging" behavior.
Sources
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At a glance
RangeIndian and Pacific Oceans
HabitatTropical coastal waters
DietFish and squid
About the Indo-Pacific Bottlenose Dolphin
In the warm, cerulean waters of the Indo-Pacific, the bottlenose dolphin glides with effortless elegance, its sleek, grey form undulating as it navigates the coral reefs and coastal shallows with precision and grace. With a flick of its powerful tail, it leaps from the waves, its dorsal fin slicing through the surface tension as it pursues the abundant fish and crustaceans that inhabit this vibrant ecosystem. As it moves, its clicks and whistles echo through the ocean, a symphony of sound that reveals the intricate social bonds and curious nature of this remarkable creature.
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