{"id":35095,"date":"2026-03-11T10:35:31","date_gmt":"2026-03-11T14:35:31","guid":{"rendered":"https:\/\/world.dan.org\/?post_type=dan_alert_diver&p=35095"},"modified":"2026-03-11T10:35:39","modified_gmt":"2026-03-11T14:35:39","slug":"the-quest-for-seahorses-and-their-kin","status":"publish","type":"dan_alert_diver","link":"https:\/\/world.dan.org\/fr\/alert-diver\/article\/the-quest-for-seahorses-and-their-kin\/","title":{"rendered":"The Quest for Seahorses and Their Kin"},"content":{"rendered":"
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\u201cIt has been said that the love of the chase is an inherent delight in man \u2014 a relic of an instinctive passion.\u201d<\/p>\n\n\n\n

\u2014 Charles Darwin, The Voyage of the Beagle<\/em><\/p>\n<\/blockquote>\n\n\n\n

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When you set out into the sea to look for the divinely weird wonders of nature, you can\u2019t do better than tracking down species in the order Syngnathiformes. Instead of the interior bony structure of ordinary fishes, these captivating oddities display an astonishing variety of elongate shapes sheathed within a semiflexible armor of ringed ridges that encircle the body from head to tail.<\/p>\n\n\n\n

The order\u2019s unconventional configurations include seahorses \u2014 the matriarchs of the lineage \u2014 along with pipefishes, seadragons, and pipehorses. The head of these fishes culminates in a pipette-like snout crowned with a dainty mouth adapted for hoovering up bellyfuls of tiny translucent specks of zooplankton wafting along the seafloor.<\/p>\n\n\n\n

Divers have long had a special attraction to seahorses that can sometimes verge on mania. What inquisitive mind wouldn\u2019t be drawn to these appealing replicas of miniature horses, with their sweeping prehensile tails lassoed around a variety of holdfasts rising off the seafloor? If you are lucky enough to happen upon one \u2014 and that can be iffy \u2014 the reluctant swimmers typically remain where you find them, allowing you to enjoy their uniqueness at your leisure. But if you press too close, seahorses invariably turn away their trademark profile, spoiling much of their charm. <\/p>\n\n\n\n

Reports of new seahorse sightings are always big news back aboard the boat or at the resort. Sharing such special discoveries is a revered tenet of critter hunters.  <\/p>\n\n\n\n

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\"Some
Some lined seahorses develop body filaments to disguise their presence along seafloors cloaked in marine vegetation.<\/figcaption><\/figure>\n<\/div>\n\n\n\n
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\"Leafy
A government mandate protects the dwindling population of leafy seadragons in Australia.<\/figcaption><\/figure>\n<\/div>\n<\/div>\n\n\n\n

Although Anna and I have enjoyed many seahorse encounters over the years, to this day we wouldn\u2019t think of passing one by without stopping to take a long, satisfying look. Most of our sightings have resulted from tips other divers have shared. One of my earliest and most memorable seahorse discoveries happened when my dinghy driver mistakenly dropped me on a bleak, algal-tufted hardpan terrain fronting Dominica\u2019s rugged volcanic coastline. The moment I glanced around the barren bottom, it was obvious there would be little to see. <\/p>\n\n\n\n

While I tried to sort out what to do next, I noticed a patch of algae twitch. Indifferent to the omen, I turned to swim toward shore. On second thought, I pivoted back, locked my gaze on the distracting algae, and inched closer. Suddenly, the profile of a seahorse fringed in flowing strands of homespun frills popped into focus out of the stringy mass. <\/p>\n\n\n\n

The sight was a thrill and a greatly appreciated showcase of the cryptic power of camouflage, which is all these creatures rely on for protection. Nature is packed with delightful paradoxes. In the case of seahorses, individuals from several different species known for their camouflaging prowess also display high-visibility shades of red, orange, yellow, and even white. The reason for these brighter colors is unknown.<\/p>\n\n\n\n

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\"Potbellied
The potbellied seahorse got its common name from the male\u2019s oversized brooding pouch. <\/figcaption><\/figure>\n<\/div>\n\n\n\n
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\"Dwarf
Florida Bay\u2019s seagrass meadows and algae-draped coastline fringing the Florida Keys\u2019 northern shore shelters a prolific population of dwarf seahorses. This one was near Key Largo.<\/figcaption><\/figure>\n<\/div>\n<\/div>\n\n\n\n

Once we began traveling to the fish-rich waters of the Asia-Pacific, seahorse sightings picked up. On our first extended trip to Indonesia to hunt for pygmy seahorses \u2014 the most iconic and by far the tiniest and cutest seahorses \u2014 quickly evolved into an obsession. And it requires an obsession to find one of the fingernail-size miniature marvels camouflaged within their natural surroundings. If you don\u2019t want to squander your precious underwater hours on such an exacting task, we highly recommend engaging a local naturalist guide who knows where to find them. <\/p>\n\n\n\n

Of the five pygmies we have been lucky enough to observe, the recently described Japanese pygmy seahorse proved the most elusive. On the volcanic Japanese island of Hachij\u014d-jima in the Philippine Sea, our party of eight \u2014 a seahorse specialist, three local guides, and four other divers \u2014 spent five hours underwater each day for five days, and we failed to find a single one.<\/p>\n\n\n\n

Never underestimate luck, especially when coupled with patience and perseverance. The next morning in the final minutes of our final dive, our host went nuts, pointing and babbling bubbles as he took celebratory bows for finding one. Our joy meter soared during our bumpy ride back to the dock. We had just made one of the best dives of our lives. As we all know, the bounty of nature comes and goes. Returning to Hachij\u014d-jima five years later, we found pygmy seahorses galore.<\/p>\n\n\n\n

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\"Weedy
Weedy seadragons are found only in Southern Australia’s waters, and those in Tasmania are the largest and most colorful.<\/figcaption><\/figure>\n<\/div>\n\n\n\n
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\"Brock\u2019s
Branching head filaments are a distinctive feature of the Brock\u2019s pipefish to help conceal it when hiding in seaweed.<\/figcaption><\/figure>\n<\/div>\n<\/div>\n\n\n\n

If your time and budget don\u2019t permit dive travel halfway around the world to encounter these celebrated spectacles, no need to fret. Florida Bay\u2019s seldom-explored seagrass meadows and algae-draped coastline fringing the Florida Keys\u2019 northern shore shelters a prolific population of dwarf seahorses every bit as enchanting as their petite Pacific counterparts.<\/p>\n\n\n\n

When Syngnathiformes eventually made their way to Australia\u2019s Southern Ocean, they reached morphological splendor in the form of seadragons. We purchased our first drysuits and took a road trip along the South Australia coast with friends, all of us eager to learn about seadragons. This venture required jetty diving among 500-foot-long (152-meter-long) forests of pilings, which are the only substantial sea life attractors along the shallow coastline for hundreds of miles.<\/p>\n\n\n\n

The jetties\u2019 shadowy underbellies provide prime real estate for oodles of unconventional Australian originals, including seadragons. The leafy seadragon we watched for much of our chilly dive glided through a dreamscape of billowing greenery, slurping up crunchy morsels of aquatic crustaceans as it went. This isn\u2019t a fish to simply check off a list \u2014 it\u2019s an unforgettable vision of nature at its improbable best that will linger in your mind for life. <\/p>\n\n\n\n

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\"Tiny
Dive guide Noldy Rumengan discovered the tiny Rumengan\u2019s pipefish (Kyonemichthys rumengani) in Lembeh Strait, Indonesia.<\/figcaption><\/figure>\n<\/div>\n\n\n\n
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\"Braun\u2019s
A toothpick-sized Braun\u2019s pughead pipefish peeks out from coral polyps covering Galaxia spp., its endemic home.<\/figcaption><\/figure>\n<\/div>\n<\/div>\n\n\n\n

That morning\u2019s dive could have easily turned into a one-fish show if so many other legendary curiosities hadn\u2019t surrounded us. Discoveries included the region\u2019s wonderfully named pot-bellied seahorse, one of the largest seahorse species, which measures up to nearly 14 inches (35 centimeters) long. Their common name gives a wink and a nod to the comically colossal brooding pouches of pot-bellied males.<\/p>\n\n\n\n

Our 2016 trip to Raja Ampat was preceded by Anna\u2019s deep dive into her extensive files of arcane fish lore. As usual, she came across a gem of a fish to seek. For this occasion she selected the supposedly rare, toothpick-sized dwarf pipefish, which had only a few scattered sightings to vouch for its existence. <\/p>\n\n\n\n

We had a couple of important advantages going into the hunt: First, we knew our quarry lived exclusively within the maze of polyps covering Galaxea hard corals. Second, we had Yann, our friend and longtime dive guide, who is always up for a challenge. <\/p>\n\n\n\n

The three of us began our pipefish quest in Ambon Bay while awaiting our liveaboard. Plenty of Galaxea<\/em> corals were around, but after two days of diving there were no dwarfs to report. Luckless pipefish hunting followed us as we sailed out of Ambon and trailed in our wake as we explored Pisang Island and the reefs off Kasirui, Kurkap, Pulau Namatote, and Tumba Tumba on our winding way east toward Triton Bay on the western shore of West Papua. Finally, on our second day in the bay, luck arrived when Yann found not one but two species of dwarf pipefish living on a rugged, coral-studded slope. The first was a curvy, 2-inch (5-cm), reddish-brown specimen speckled with dots, known as a pughead pipefish. This fish epitomized adorable, and the second exhibited a viper\u2019s demeanor and triangular head. Anna shared the discovery with our shipmates after the dive and made plans for everyone to visit the site in small groups. Meanwhile, the guides were out on the slope with Yann, becoming familiar with the new superstars. <\/p>\n\n\n\n

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From the start of the hunt, Yann was aware of the dwarf pipefish\u2019s small size and restricted habitat. But what mattered most was that he was aware the fish existed. Once the boat\u2019s guides and guests had the opportunity to study the dwarf pipefishes and take note of their size, shape, color, and habits, each could style a personal search image. Everyone on board realized there was a seductive new fish to find on the reef.<\/p>\n\n\n\n

By the time we left the bay two days later, we had added three more pugheads to our count. Back in Ambon, where it all began, another pughead turned up on the reefs where we had previously hunted. The following week in Manado, North Sulawesi, I showed the pipefish\u2019s image to a group of local guides. No one had seen such a thing, but two guides did the next day on their home reefs, where they had hunted for years.<\/p>\n<\/div>\n\n\n\n

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\"Short-tailed
The pelagic juvenile phase of the short-tailed pipefish loses its elaborate set of frills soon after settling to the seafloor. <\/figcaption><\/figure>\n<\/div>\n<\/div>\n\n\n\n

It is difficult to convey the patience required to find a tiny, well-camouflaged creature that doesn\u2019t want to be found. Noldy Rumengan, a veteran freelance dive guide in North Sulawesi, carefully sorted stem by stem through a confusion of algae, searching with patient, well-practiced eyes for small animals hiding from predators. Noldy possessed an inherent passion for all manner of discoveries, from rediscovering a favorite species to finding a long-sought creature that struck his fancy. The prestige of uncovering a species unknown to science is thrilling, but the pinnacle of critter hunting is discovering a life form no one ever imagined.<\/p>\n\n\n\n

On Noldy\u2019s evening of discovery, his client canceled at the last minute, so he decided to dive with a friend. It was a welcome opportunity to hunt slowly, uninterrupted, and on his own terms. Minutes or maybe half an hour later, his mind struggled to make sense of a crusty strand of vegetation that looked much like every other one attached to a patchwork of seaweed. The image just didn\u2019t seem quite right for some reason.<\/p>\n\n\n\n

Noldy cocked his head and moved closer, where a teeny eye, no larger than a period on a page, gave the animal away. Moments later the strand with an eye lifted free, revealing a slim, arching body with a lengthy tail. With a pipefish\u2019s slender body and head and a seahorse\u2019s prehensile tail, this creature had Noldy wondering exactly what he had found, but he sensed it could be the trophy of his life.<\/p>\n\n\n\n

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The mysterious strand, measuring less than an inch (2.5 cm), turned out to be not only a new species but also a new genus of pipefish, which was named Kyonemichthys rumengani<\/em> in Noldy\u2019s honor.<\/p>\n\n\n\n

Nearly all marine fishes, including seahorses and pipefishes, pass through an early stage of development in the open ocean before settling to the seafloor, where they live out the remainder of their lives. From what we\u2019ve seen when exploring the open ocean at night, most marine fishes produce tiny, translucent larvae bearing little resemblance to their parents. A few of the most exquisite specimens, such as wispy jellyfish, trail long filaments and elaborate fins to mimic stinging gelatinous zooplankton.<\/p>\n\n\n\n

The pelagic offspring of seahorses and pipefishes, for some unknown reason, bypass the larval phase. Instead, these juveniles set out on an extended, dangerous oceanic voyage. These open-water offspring are surprisingly large, mostly opaque, and generally resemble adults. One pretentious juvenile pipefish we encountered in the offshore waters of Indonesia bucked the trend, however, looking more like a flying dragon than an unadorned adult.<\/p>\n\n\n\n

Few fish are more coveted than ghost pipefish. The five species of iconic, not-quite-right masters of camouflage exemplify natural selection\u2019s prowess to amaze. In much the same fashion as seahorses, ghost pipefish juveniles no larger than straight pins spend 90% of their short lives in the open ocean.<\/p>\n<\/div>\n\n\n\n

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\"The
The short filaments adorning the body and fins of the ornate ghost pipefish help them hide from predators among the long, spikey arms of crinoids. <\/figcaption><\/figure>\n<\/div>\n<\/div>\n\n\n\n

When they are ready to breed, the gossamer waifs settle along the shallow coastlines of protected bays. Once in their new surroundings, they undergo rapid growth spurts and fashion custom-tailored wardrobes that match their new surroundings before vanishing like ghosts into the arms of crinoids, algal thickets, leaf litter, and seagrass meadows.<\/p>\n\n\n\n

Like with all the other dazzling illusionists comprising this crafty clan of cryptic tricksters, the fun and joy come from trying to find them.<\/p>\n\n\n\n

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En savoir plus<\/strong><\/h2>\n\n\n\n

Watch a leafy seadragon and mating ornate ghost pipefish in these videos.<\/p>\n\n\n\n

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