In captivity, this dolphin has hybridized with the common bottlenose dolphin ("Tursiops truncatus"). Between 200 and 800 Bottlenose dolphins ("Tursiops truncatus") also live in the Indian River Lagoon. Sedentary common bottlenose dolphins ("Tursiops truncatus") regularly play group in the Pass. It can hybridize with the bottlenose dolphin ("Tursiops truncatus") to produce fertile offspring called "wholphins". In captivity, the long-beaked common dolphin has hybridized with the common bottlenose dolphin ("Tursiops truncatus"). Bottle-nosed Dolphins ("Tursiops truncatus") (Montagu 1821) are seen in the estuary. In the early 21st century, bottlenose dolphins ("Tursiops truncatus") are commonly sighted off the island. The bay also has its own resident population of bottlenose dolphin ("Tursiops truncatus").