A new animal attraction is quickly taking shape at SeaWorld San Antonio, but its residents might be a bit slow while roaming around their new home once it is completed. One of the largest tortoises in the world, the Aldabra tortoise – a species currently listed as vulnerable - will soon have a new habitat at SeaWorld San Antonio. Aldabra Island, a new state-of-the-art 7,000 square-foot tortoise habitat will be the perfect size to accommodate the giant reptiles that can weigh upwards of 500 pounds and stand four feet tall.