Wildlife biologist Forrest Galante has embarked on a journey along the U.S. coastline, documenting four unusual shark species that he likens to "alien creatures." The expedition, featured in a Discovery Channel special, spanned from Southern California to the Gulf Coast, the Florida Keys, and New England, highlighting the diverse and often strange marine life inhabiting American waters.
Galante's search began in Southern California with the swell shark, a species known for its ability to inflate its body to twice its normal size and its bioluminescent properties. Researchers have observed swell sharks glowing in the dark, a trait believed to be a form of communication in low-light ocean environments. These sharks can also rest on the ocean floor, using a technique called buccal pumping to breathe, allowing them to hide in rocky crevices for extended periods. Galante discovered an egg case of a swell shark, resembling a leather pouch, and later encountered an adult shark camouflaged in a cave. The bioluminescence of the swell shark, which has eyes adapted for night vision, left a striking impression on the explorer.
The expedition then moved to the Gulf Coast to find the bonnethead shark, a smaller member of the hammerhead family with a shovel-shaped head. This species is notable for its unusual diet, consuming both plants and crustaceans, and for its unique reproductive capability. Bonnethead sharks are among the few known shark species capable of parthenogenesis, a form of asexual reproduction where a female can produce viable offspring from an unfertilized egg. Galante described this ability as "bizarrely strange."
In the Florida Keys, Galante searched for the nearly extinct small-toothed sawfish, a creature with a distinctive, chainsaw-like bill. With fewer than 1,000 individuals believed to remain, this species has faced significant population decline due to disease and coastal development. Galante collaborated with local experts who were tagging and releasing sawfish. The team encountered a 13-foot-long sawfish that had been previously tagged, providing valuable data on the animal's movements and condition. The sawfish's elongated rostrum is equipped with electroreceptors that help it detect prey in murky waters.
The final subject of Galante's exploration was the basking shark in the waters off Cape Cod, New England. This gentle giant can reach lengths of nearly 30 feet, making it significantly larger than many other shark species. As a filter feeder, it consumes plankton near the ocean's surface. Galante and his team spotted a massive basking shark, which aerial drone sensors initially mistook for a vehicle. This particular shark was estimated to be over 30 years old and showed signs of a long migratory life along the U.S. East Coast.
