Holcomycteronus profundissimus, also known by its synonym Grimaldichthys profundissimus, (Danish: Grimaldis slangekvabbe;[1] Finnish: Grimaldikala;[2] Italian: Pesce di Grimaldi[3]) is a species of deep-sea fish in the cusk-eel family.
The fish has an elongated body of a uniform sallow yellowish color. It is about 22abbr=onNaNabbr=on in length and has rudimentary eyes. Very little is known about its habitat, ecology and biology.
The first specimen was found in Atlantic waters in August 1901 at a depth of 6035m (19,800feet) in the hadal zone southwest of the Cape Verde Islands. It was caught during an oceanographic cruise by Princess Alice of Monaco using a fish trap designed by her husband Prince Albert I.[4] The genus to which this species belongs was initially named Grimaldichthys after the ruling family of Monaco.[5]
Other specimens of this fish were recorded later in the Pacific and the Eastern Indian oceans at depths between 5180and(-). For many decades it was thought to be the fish living at the greatest depth in the world until the species Abyssobrotula galatheae—one specimen of which was found at a depth of over 8000m (26,000feet)—was described in 1977.[6]