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Beebe's Abyssal Fishes
Beebe's Abyssal Fishes
Type Oceanic/ Fish
First Sighting 1930s
Last Sighting 1930s
Country Off the coast of Bermuda
Habitat Deep Oceans (2,500 feet deep)
Possible Population Unknown

Beebe's Abyssal Fishes (The word fishes indicates a different species in Biology, different from the plural fish) are deep-sea fish observed by William Beebe in a bathysphere in the North Atlantic Ocean off Nonsuch Island, Bermuda, between 1930 and 1934 and never seen since. These include an Abyssal Rainbow Gar, Bathysphaera IntactaFive-Lined Constellation FishPallid Sailfin, and a Three-Starred Anglerfish. Beebe’s bathysphere dives incorporated the first direct observations of abyssal fishes in their natural environment.

On 22 November 1932, Bermuda-based zoologist Dr William Beebe was 2100 ft beneath the surface of the sea in a bathysphere, sited 5 miles southeast of Bermuda's Nonsuch Island. While he was observing the denizens of the deep passing by the bathysphere's windows, two very unusual fishes became illuminated in the craft's electric beam of light as they twice swam past it, no more than 8 ft away. Their long slender bodies, each of which was at least 6 ft long with strongly undershot jaws housing numerous teeth, reminded Beebe of barracudas, but running along either side of each fish was a single, laterally-sited, horizontal row of luminous organs (photophores), little short of twenty in total, and every one emitting a powerful pale blue light.

Equally striking were the two twitching, tentacle-like structures that hung down beneath each fish - one arising from its lower jaw, the other from the beginning of its short anal fin. Once again, each of these structures emitted light, by virtue of a pair of organs at its tip; the organ attached directly to the tentacle shone red, the other one (attached to the red organ) shone blue. Also noteworthy was their vertical dorsal fin, positioned well back towards the tail-end of the body. Beebe was unable to discern any pectoral fins or pelvic fins.

From these fishes' general morphology, Beebe concluded that their species was most probably allied to the melanostomiatids, popularly known as the scaleless black dragon fishes. However, its single line of lateral photophores, not to mention its pair of ventral tentacles with light-emitting terminal organs, unequivocally distinguished it from any known species within that family. As a result, Beebe christened his mystifying discovery Bathysphaera intacta ('untouchable bathysphere fish'), sole member of a new genus.

Bathysphaera was not the only hitherto unknown species of deepsea fish that Beebe discovered and named, but was unable to capture, during his Bermudan bathysphere observations in the early 1930s. He spied a mysterious, 2-ft-long, torpedo-shaped fish at depths of 1500 ft and 2500 ft, and named this grey-coloured species the pallid sailfin Bathyembrix istiophasma. He also described the three-starred angler fish Bathyceratias trilychnus, a 6-in-long species sighted at 2470 ft, bearing three 'fishing rod' structures (illicia) on its head, and clearly allied to the deepsea angler fishes (ceratioids); as well as the five-lined constellation fish Bathysidus pentagrammus, spotted at a depth of 1900 ft and resembling a Chaetodon butterfly fish or an Acanthurus surgeon fish, but exquisitely decorated with five glowing lines of yellow and purple photophores on each side of its roundish body.

Just as beautiful was a long-beaked multicoloured fish with scarlet head, blue body, and yellow tail that Beebe informally named the abyssal rainbow gar - four of which he observed swimming together in a stiff, almost upright posture at a depth of 2500 ft.

No specimens of any of these 'untouchable' species have so far been obtained. Consequently, as with Bathysphaera, and assuming that Beebe's testimony was truthful, they are secrets of the sea that were revealed to humanity only briefly before disappearing back into its depths' dark and alien anonymity.