Described in 2009 and recorded almost only from Ambon. Cryptic, light-sensitive and rarely out in the open.
Unlike anything else. To about 8.7 cm standard length, with a broad flat face and forward-facing eyes — possibly binocular, which is rare in fishes — thick fleshy cheeks and chin fringed with skin appendages, a small mouth, and loose skin in conspicuous folds that envelop the unpaired fins. It is patterned in tan, peach and brown swirling stripes radiating from the eyes across the body, fins and “feet”, with turquoise margins. That pattern is unique to each individual, like a fingerprint, and unusually for a frogfish it does not change with habitat; offspring share their parent’s pattern. Most striking for a frogfish, it has essentially no lure: the rod is minute and visible only under a microscope, and there is no esca at all. Descriptions of a “tiny luring appendage” overstate a vestigial structure. WoRMS places it in Histiophrynidae; a 2025 phylogeny would sink that back into Antennariidae as a subfamily.
It does not swim. It hops, striking the seafloor with its pectoral fins while expelling water through its tiny gill openings, tail curled hard to one side, so that it bounces along the bottom — behaviour not recorded in any other fish. It prefers to crawl, and it is shy, back into cover within ten or fifteen minutes of being found. Lacking a lure it appears to hunt by wedging into crevices and pushing with its fins before taking prey by suction. The female broods, wrapping her caudal, dorsal and anal fins around a clutch of about 220 eggs to form a pouch and fanning them. The discovery is worth recording: it was photographed alive in Ambon Harbour in January 2008, but two preserved specimens had been sitting in a museum since 1992, sent from an aquarium shipment and shelved unidentified for sixteen years. The confirmed wild population is Ambon, at 4.5 to 7.5 m in coarse rubble; Halmahera is plausible, and the frequently repeated Bali record rests entirely on those aquarium-trade specimens and is probably a mislabelled shipment.
Ratings are per location: 1 means found on most dives that look for it, 5 means a handful of records. Where enough dives have been logged the figure is calculated from them; otherwise it is an editorial estimate, and says so. We publish habitat and destination, not the dive site.