Seamoth

The Seamoth, represented here by Pegasus volitans, belongs to the small family Pegasidae, a group of unusual bottom-dwelling fishes found across the tropical Indo-Pacific. Encased in fused bony plates rather than scales, seamoths are named for their broad, wing-like pectoral fins, which superficially resemble tiny wings or the mythical winged horse. They are not closely related to seahorses despite a similar armored appearance, instead forming their own distinct lineage. Seamoths are small, rarely exceeding 9 cm, and are most often seen resting motionless on sand or mud in shallow coastal waters. They are not considered threatened but are collected occasionally for the aquarium trade.

Seamoths are unmistakable once seen clearly, though their camouflage makes them easy to miss.

• Body: flattened top-to-bottom, encased in hard, ridged bony armor rather than scales
• Pectoral fins: unusually large and wing-like, often spread flat against the substrate
• Snout: long, tubular, and angled downward beneath the eyes
• Color: mottled brown, tan, and grey matching sand or silt
• Size: tiny, typically 6-9 cm
• Tail: thin, ringed, tapering section behind the main armored body Their fused armor plating and oversized pectoral "wings" clearly separate them from any true bony fish or the superficially similar seahorse.

Seamoths are found across the tropical Indo-Pacific, from the Red Sea and East Africa to Japan and northern Australia, typically in shallow coastal waters from a few meters to about 30 meters deep. They favor soft sandy or muddy seafloors, often near seagrass beds, river mouths, or sheltered bays, where their coloration blends with the substrate. Seamoths are strictly bottom-associated and are rarely seen swimming in open water, instead resting on or "walking" across the seabed using modified fin rays. They tolerate warm tropical to subtropical temperatures and are most commonly encountered by divers doing slow, close searches of sandy patches near reefs.

Seamoths spend most of their time resting motionless on the seafloor, relying on cryptic coloration and their flattened shape to avoid detection. When they do move, they use stiffened lower pectoral and pelvic fin rays almost like tiny limbs to "walk" or shuffle across sand rather than swimming freely. They feed by probing the substrate with their downturned tubular snout, sucking up small worms, crustaceans, and other tiny invertebrates. Little is documented about their reproduction, but like many small benthic fishes they are thought to form temporary pairs during spawning, releasing eggs into the water column. Seamoths are solitary and mostly nocturnal or crepuscular, becoming more active around dusk and dawn.