Staying with are vertebrate streak we present the humerus of one of two species of Common Dolphin Delphinus delphis. Common Dolphins (aka Saddleback Dolphins), are aquatic carnivours mammals that feed primarily on fish. They are highly social animals and travel in groups of 10-50 and have been spotted in schools of over 1000. They, like their Bottlenose cousins, are also extremely fast swimmers reaching speeds of around 40km/hour.