The island is surrounded by reefs and shoals, including the extensive Neva Shoals. The islands are rimmed by reefs and shoals. Bligh turned south-west, and steered through a maze of shoals, reefs, sandbanks, and small islands. Total coral reef area of the shoals is over . Major ports include Guntersville, Chattanooga, Decatur, Yellow Creek, and Muscle Shoals. Whale-Skate Island is a submerged island in the French Frigate Shoals. This location has numerous shoals and frequent rough seas. Dolphin pods often reside near large tuna shoals. On 13 October, she ran aground on the Massachusetts Shoals. It has shoals and low-level rapids. Laura and Lydia Rogers are sisters from Muscle Shoals, Alabama. These fish live in shoals or schools. Florence is served by the Northwest Alabama Regional Airport in Muscle Shoals. St. Brandon, also known as Cargados Carajos Shoals, is located northeast of Mauritius Island. There are 22 named islands and shoals.