These sharks can grow to impressive sizes, with adult females typically reaching lengths of around 15 to 21 feet (4.6 to 6.4 metres) and males reaching slightly smaller lengths. Some very large individuals have been recorded at over 20 feet (6 metres) in length. 

Hammerhead sharks can be found in oceans worldwide, from coastal waters to the open ocean. They prefer warm, tropical waters, but some species are also found in cooler regions. 

Basking sharks (Cetorhinus maximus) are the second-largest living shark species, known for their gentle nature and filter-feeding habits. They primarily feed on plankton, which they filter from the water using their gill rakers as they swim with their mouths wide open.