Captain Hammerhead the commander of the Dark Orca pirate sub, and the father of Smiling Finn and Mad Madeline. He is 43 years old and 187cm (6’1”) tall.

His name is mostly likely an alias based on his obsessed with the classical pirates. He is greedy, but he would put his children first. If need be, he'll reluctantly work alongside the Nekton Family if is kids are at risk. He loves his daughter and spoils her rotten. He is obsessed with William Nekton's artifacts, believing that they will lead to vast treasure.

So far, Captain Hammerhead only appears on the animated series. Captain Hammerhead is voiced by Michael Dobson (who also voices William Nekton).

The Deep animated series characters
Nekton family Antaeus "Ant" Nekton | Fontaine Nekton | Jeffrey | Kaiko Nekton | William "Will" Nekton
The Guardians Glaucus | Nereus | Proteus | Tethys
Hammerhead's Pirates Danny Boy | Dolos | Hammerhead | Mad Madeline | Smiling Finn
Other Villians Alpheus Benthos | Sebastian Conger
Others Agnes De-Kretser | Professor Fiction | Bob Gorman | Griffin| Kenji | Lester | Devil Daniels | Commander Pyrosome