Did you know that parrotfish covers itself with mucus cocoon at night?

By Gregg Yan

A bicolor parrotfish

Over the past years, social media posts have been circulating about the need to avoid parrotfish, popularly called loro or molmol in public markets.

These posts have been shared tens of thousands of times with the best of intentions, but there’s more to the discussion than simply banning the capture of these colorful reef residents.

Just what are parrotfish? Parrotfish are any of the 90 or so fish species belonging to the wrasse, pronounced rass, family. They’re common sights in tropical coral reefs because of their football-like shape, relatively large sizes, usually six inches to over three feet, and their weird swimming behavior. Most wrasses use their pectoral or “arm” fins to glide like mammals. They also have insanely vibrant coloration. Get a psychedelic drug and imagine a green fish. Voila, you get a parrotfish.

With teeth fused into a parrot-like beak that’s harder than gold, silver, or copper, they efficiently scrape the surfaces of coral and rock, crushing whatever they eat into the sand, which they poop out.

“Parrotfish are one of the many agents of bioerosion in coral reefs. Bioerosion combines physical and chemical erosion, plus natural reef growth. This natural process is important in maintaining the health of coral reefs,” explains Dr. Rene Abesamis, a noted marine scientist.

We divers love them because they’re great photo subjects, especially when they graze. They don’t flit around as much as, say, damselfish. Their constant crunching can also be heard underwater, a constant reminder that reefs are very much alive and in flux.

Fishermen like them because they have a tendency to sleep at night in predictable locations, usually cocooned in a protective mucous good enough to hide from most predators, but not determined fisherfolks armed with spearguns. Thus, markets from Cebu to Curacao are constantly stocked with parrotfish.

Parrotfish covers itself with mucus cocoon at night

As a diver and environmentalist, I’d like nothing more than to see wildlife left alone in their cozy coral reef homes. We need to stick to science and consider marginalized coastal communities to dispel the following notions about parrotfish.

They keep corals healthy.

Practically all social media posts portray parrotfish as “shepherds,” which eat hair algae, preventing them from taking over coral reefs.

“Most parrotfish don’t really eat visible algae. They graze on microscopic bacteria, which live on reef surfaces, including rocks, corals, and even seaweed. Some species also eat live coral, which is converted to sand,” explains Kent Sorgon, an ichthyologist or fish scientist. A large parrotfish like a Bumphead (Bolbometopon muricatum), for example, can transform a ton of live coral into white sand each year.

Without parrotfish, coral reefs will wither and die.

This might be so if parrotfish dined purely on fast-growing hair algae, but as above, they mostly target cyanobacteria growing on reef surfaces. Many other grazers do a better job at keeping visible algae from choking off coral reefs, like rabbitfish, damselfish, and most especially surgeonfish, something I investigated in the Tubbataha Reefs in 2013.

A 2015 study by Dr. Angel Alcala and other scientists found no significant correlation between the presence of parrotfish, hard coral cover, and algae. It was instead found that more parrotfish were recorded in areas with less hard coral cover. I can attest to this. Diving in Laiya in Batangas in the early 2000s, I saw the most parrotfish in rubble areas devastated by storms, not in healthy reef areas.

“A recent review of studies around the globe concluded that there’s almost no empirical support for the idea that protecting parrotfish prevents coral reef decline,” adds Dr. Abesamis. “These notions can distract us from addressing the true drivers of coral reef decline such as siltation, pollution, destructive fishing practices, and climate change.”

Banning the capture and sale of parrotfish is an effective conservation tool.

Experience has already shown that total fishing bans for selected groups of fish caught in non-selective gear, like a large net left for a few hours around a patch of reef, simply don’t work.

“What a fishing ban on a specific group that’s also economically important might do is to likely shift fishing pressure to other groups, which can adversely affect coral reef systems,” adds Kent.

Many fishers in the Philippines and beyond depend on various types of reef fish for their sustenance and livelihoods. Simply saying “stop fishing for parrotfish!” won’t work, even if you ask nicely and say please, and will most likely be resented by subsistence fishers living well below the daily poverty threshold of ₱100 daily.

“A ban isn’t inclusive for fisherfolk because it’s a solution, which caters to either the environment or people, not both. Sustainable solutions should be created in partnership with those who directly rely on marine resources. Fishers should always be considered collaborators for conservation, never enemies,” notes Gela Petines, founder of Batang VIP.

Except for Bumphead Parrotfish, which are classified as vulnerable by the International Union for the Conservation of Nature (IUCN), a total ban on catching parrotfish shouldn’t be a priority management action. “If the objective is to sustain fisheries, then parrotfish must be managed just like how most other reef fish targeted for food are managed,” adds Dr. Abesamis.

The loro has strong beaks for eating algaes of corals

Parrotfish are more important than other reef denizens.

Let’s be clear: All sea creatures are equally important, being connected in ways that we’re only beginning to understand. Though cute and charismatic creatures like whales, dolphins, sea turtles, and large fish are far easier for people to relate to, even the smallest plants and animals serve a greater purpose.

Corals, sponges, clams, and barnacles, for instance, act as living filters, forever straining water of particulate matter. Sea urchins and cucumbers are effective grazers and scavengers. Even what we can’t see, microscopic free-floating algae, provides food for trillions of fish while generating much of the oxygen you and I are breathing now. Eliminate one group and the system can change dramatically.

And because all sea creatures are equally important, the solution to save the world’s coral reefs isn’t to ban the capture and sale of a single fish group. It is to ramp up efforts to conserve the planet’s remaining coral reefs by veering away from expensive and dirty fossil fuels that accelerate human-induced global warming, minimizing coastal development, particularly reclamation, and avoiding single-use plastics. Just imagine how much extra plastic we’re using now for face masks, face shields, takeout food… and Shopee or Lazada packages. Minimizing coastal pollution and run-off from rivers, better management of fisheries, and shifting to more sustainable alternatives and empowering instead of castigating coastal communities whose lives and livelihoods depend so much on the sea will also help.

When we apply these solutions cohesively, we protect not just our lovable, colorful parrotfish, but the natural systems that can keep tomorrow’s oceans as vibrant and productive as they are now… and that’s the secret to saving loro.

Gregg Yan is the executive director of Best Alternatives, an environmental nonprofit group that promotes sustainable and equitable alternatives to various products and practices.


Source: Manila Bulletin (https://mb.com.ph/2021/04/28/finding-loro-the-truth-about-parrotfish/?utm_source=rss&utm_medium=rss&utm_campaign=finding-loro-the-truth-about-parrotfish)