•
"Shark" Sands- An unseen character, Sands is a rival animal collector. His nickname, "Shark," was given because he used to do some sharking in the South Seas. Reputedly, he narrowly escaped a murder charge in the
Philippines, and has recently purchased the second-largest animal collection business, behind John Hunt's. Having little knowledge of wildlife, Hal suspects that Sands is using foul means to achieve success. It is believed that Sands started the fire that destroyed the Hunt property on Long Island, destroying his entire animal collection, forcing John Hunt to return home. Hal also suspects that Sands hired the man named Croc to sabotage their expedition. What ultimately happened to him is unknown. •
Croc- Hal suspects that "Croc" was hired by the rival animal collector "Shark" Sands to sabotage their expedition. Hal nicknames him Croc because his teeth are ''"snaggled and discoloured like a crocodile's."'' Hal first notices Croc following him in
Quito, and again sees him at
Iquitos. When Croc's hired thugs are beheaded by Cocamas Indians, Hal decides to help him, and Croc steals their boat and deserts them, leaving them to die beside the Amazon River. By boarding a floating island of land, Hal and Roger eventually catch up with Croc, overpower him and lock him in the
anaconda cage. On their arrival in Manaos, the police arrest Croc for
robbery and incendiarism, and for the murder of twelve Indians. •
Banco- A 'caboclo,' or a mixture of
Indian and
Portuguese, Banco is hired by Hal at
Iquitos to help with capturing animals. A stubborn coward, Banco often does not do what he is told, and his foolish actions botch an attempt to capture a
jaguar, resulting in the magnificent animal's death. Shortly after the brave Indian Aqua is killed by an
anaconda, Banco convinces the other Indians to flee during the night with one of the boats. ==Reception==