June 14, 2022 - In addition to two small noble pen shells, two adult noble pen shells were found in the sea near Rovinj. It is an endemic species of great importance to the marine ecosystem. In the last few years, newly discovered parasites and bacteria have spread through the Mediterranean, bringing this shellfish to its most difficult period in history.

Dr. sc. Andrej Jaklin from the Center for Marine Research of the Ruđer Bošković Institute in Rovinj says that they are in excellent condition, they have grown somewhere between 3-4 cm since last year and they react normally, writes HRT.

Periscopes are on the verge of extinction

Along with them, two small periscopes kept in the Pula Aquarium were found on collectors placed nearby. According to Aleksandra Bel Dajaković, head of the professional department of Aquarium Pula, they are in strictly controlled conditions, where in reality every parameter is controlled and they take care of them every day and watch how they progress.

This noble shellfish can grow up to one and a half meters, weigh over 3 kilograms and live up to 50 years, and is of great importance to the marine ecosystem.

"It is the largest Mediterranean shellfish that filters large amounts of water daily and thus contributes to the purification of water, eliminating excess organic matter from the water.", says Dr. sc. Andrej Jaklin.

The noble pen shells have been hit in the last 4 years by a plague of pathogens that have led them to almost extinction.

Dangers of anchors and curious tourists

In addition to searching the seabed and finding living individuals to preserve this species, various protection actions have been initiated. Protective cages are set up if it is near an anchor or there is an octopus threat.

Various education initiatives can raise public awareness in order to preserve the world of the noble pen shell - the largest shellfish in the Mediterranean.

For more, check out our lifestyle section.

June 2, 2021 -  When TC editor Iva Tatić caught the fish nobody could identify, TCN reporter Ivor Kruljac jumped to action in the hope he will find a marine life scoop. But after the dramatic realization that Atlantic lizardfish is nothing spectacular, he became a journalist clickbait victim. Meet the mystery fish on Korčula. 

It was early evening between 7 pm-8 pm on the eastern Korčula coastline on May 28. After a long week of handling the Total Croatia site, TC editor Iva Tatić decided to chill and went fishing. Instead of managing the multilingual site that brings you the best tips on how to travel and enjoy Croatia, she must've been happy with the idea she can enjoy in Croatia herself, as she was preparing two hooks – one with a squid and the other with the piece of bread. Marine life must be very humble cause instead of a squid (absolutely delicious, either fried or grilled and stuffed with swiss chard), the bread was the taken bait for the careless fish soul underneath the Adriatic surface.

Iva took the opportunity and caught its prey, but pretty soon, happiness for the catch was additionally spiced with curiosity.

the source of curiosity and happiness © Iva Tatić

„What the hell is this?“ Iva asked the local Korčula fishermen showing them her catch.

And „no idea“ was the consensus by other marine life hunters.

„Locals call it the spider“, said a local fisherman known as Pero to Iva. „It looks like Spiderman“.

Iva didn't feel that Spiderman is an accurate comparison, and as no one really knew the answer, the whole thing went online.

After Iva shared the photos of its catch on Facebook, the online jury narrowed the mystery to two possible suspects: Saurida and Atlantic lizardfish.

Still being new and wanting to gain recognition in the newsroom, I took on myself to investigate what exactly is this Aquaman-Spiderman-love-child. Perhaps it's something invasive, a threat to the lovely Adriatic, and a fantastic journalist story.

The case, the challenge, the scoop © Iva Tatić

Word on the expert street

A little bit of browsing through the pages of Rovinj Sea Research Centre (CIM), and a few calls, led me to the CIM Senior scientific associate, dr. Andrej Jaklin.

„It looks like Atlantic lizardfish, I saw that fish in person on Pelješac 15 years ago“, said Dr. Jaklin on the phone while looking at the images of the catch I sent him.

Jaklin's memory also seems fit with Pelješac being close to Korčula Island. Still, he said he can't really tell me too much about the fish and recommended it to me to contact dr. Marcelo Kovačić from the Natural History Museum Rijeka. However, dr. Kovačić, a curator for vertebrates, was on vacation, so the call was picked up by Milvana Arko-Pijevac, curator for marine invertebrates.

„I think this could be an Atlantic lizardfish, the head looks like it should, but I'm specialized for invertebrates, mollusks and shellfish“, said Silvana Arko-Pijevac.

So until that point, two experts for marine bio life are certain this is an Atlantic lizardfish (Synodus saurus). Fish, from Atlantic, I thought. Are we talking about an invasive species that manage to come to the northern dead-end of the Mediterranean all the way from the Atlantic? If so, is it hazardous to the domestic sea life of the Adriatic?

Despite recognizing the fish, neither Jaklin nor Arko-Pijevac couldn't say more details, but it's worth noting that the scientific community can once again serve as a role model to everyone who thinks they are experts on everything (both in Croatia but a trend we see spawn worldwide). Instead, my interlocutors accepted and pointed out the limits of their knowledge and suggested me someone who knows more.

Clickbait: It's not just for journalists anymore!

It took me a while to reach Dr. Jakov Dulčić from the Laboratory of Ichthyology and Coastal Fishery at the Institute of Oceanography and Fisheries in Split. First, he was not in the office, and later, he was at a meeting. But, with Arko-Pijevac's claim that Dulčić is the best ichthyologist in all of Croatia, it was worth the wait.

Finally, my mobile phone impulses from Zagreb caught dr. Dulčić in Split, and I excitedly asked him for help. To identify and say a bit more about the mysterious fish fishermen in Korčula failed to recognize, but is suspected to be the Atlantic lizardfish.

„I have to see the photos to say for certain“, said Dulčić.

„I already sent them to your e-mail before this call. Can you please refresh your E-mail?“, I asked with hearable excitement in my voice and suspense in my gut.

The suspense only grew as Dulčić was opening the e-mail.

„Found it!“, he said and I almost screamed out of excitement,

„Yes, indeed, that is the Atlantic lizardfish“, confirmed Dulčić with a relaxed voice while I was ready to ask tons of questions about this weird and possibly invasive species.

„But that is neither exciting nor anything special to catch in the Adriatic“, continued Dulčić with the same chilled tone.

I listened to that sentence with a blank expression fortunately, nobody has seen it except the walls in my apartment.

„You might think it's unusual in Croatian waters because of its name, but it's the normal fish that lives in Adriatic“, added Dulčić.

I couldn't help but think what a sour poetic justice. Being a journalist, a member of the profession in which some of my colleagues try to catch views by clickbait, to be hooked (pun intended) on a clickbait in scientific terminology.

„They can be found across the Adriatic sea, everywhere in Croatia. Their population used to be smaller in the previous years, but it recently got larger. It seems they have certain cycles, but it's nothing spectacular“, he concluded.

„But how come none of the fishermen recognized it?“, I asked puzzled.

„Interestingly enough, it is often caught, but it can rarely be seen on the fish market, and that's a place thanks to which you can usually recognize fish“, explained Dulčić.

However, informing and educating fishers and the general public about marine life in the Adriatic is something dr Dulčić and the Oceanographic Institute are very dedicated to.

Presenting you the Atlantic lizardfish © Iva Tatić

This is evident by the LEKFishResCRO project.

„This project will address the need to improve knowledge on the trends in Adriatic fisheries with novel methods as well as to acknowledge recent changes in fish biodiversity in a complex Adriatic ecosystem. The central objective of the project will be to evaluate the potential use of the LEK in developing the knowledge base for fisheries management and conservation. The strategy employed for this evaluation will be a two-way discussion between fisherman and other stakeholders from one side and fisheries biologists from another side around the subject of what sorts of indicators of ecosystem health would make sense in light of both the LEK of the fishers and the research-based knowledge (RBK) of the fisheries biologists“, says LEKFishResCRO website, and with loads of materials, you can check yourself.

„We collaborate well with fishermen, we work on their education, and with their tips and images they sent from the field we quickly gather research data“, explained Dulčić.

The invasive species are legitimately a threat to Adriatic, and it comes from the Red Sea through Eastern Mediterranean, but these examples are excellent topics for some other articles.

In the meantime, the mystery fish is identified as a mainstream species in the Adriatic. Somewhat newsworthy (maybe?), but this time my ship returned without a scoop from the stormy cruise in the sea of information.

I sent a message to Iva explaining what she caught (which she already found out on her own, she is a good journalist after all), and I only confirmed that she can unfreeze it and eat it safely. Additionally, I found this recipe at least.

Korčula and Adriatic Sea, Pixabay

Enjoy the Adriatic, but respect marine life

In an attempt to conclude this investigative piece (let's pretend it is one, please) on a socially responsible and eco-friendly note, I asked dr Dulčić if there are any type of fish tourists and locals shouldn't fish because it's on the verge of extinction and if caught it should be returned to the sea immediately. „Such fish is living in areas and conditions where you can't catch it with hooks or nets. But Do not dive out noble pen shells (Pinna nobilis), or disturb mammals such as dolphins. And be careful around sharks and jellyfish“, concluded dr. Dulčić.

Learn more about Korčula on our TC page.

For more about science in Croatia, follow TCN's dedicated page.

April 18, 2021 - Four surviving noble pen shells in Pula and Medulin have been caged for protection.

Morski.hr reports that four noble pen shells (Pinna Nobilis), named Tara and Sara in Pula, and Mara and Pina in Medulin, have survived in the wild despite the plague that has gripped the entire Mediterranean in recent years.

Metal cages were set up to protect the surviving specimens from potential predators, which are also, unfortunately, humans. The openings on them are small enough to stop gilthead seabream, octopus, and bumpy starfish and large enough to allow seawater flow with phytoplankton and zooplankton that Pinna Nobilis feed on by filtering water.

Marinko Babic

To avoid placing concrete blocks, they used a more environmentally friendly technique to drill the base with an underwater electric drill and install screws to secure the cages.

Like the previous activities of the Eko More Association, the installation of protective cages was carried out in coordination and by order of the competent institutions (Ministry of Economy and Sustainable Development - Institute for Environmental Protection, Brijuni National Park, JU Natura Histrica).

Marinko Babic

Summer is ahead of us and a critical period for Tara, Sara, Mara, and Pina, as the endoparasite Haplosporidium pinnae become active at sea temperatures above 13.5 ° C. The noble pen shells recovered nicely during the winter and grew 10-15 mm, which gives a glimmer of hope that they will successfully survive this summer as well.

Anyone who has useful information or observations can help in the search for other surviving Pinna Nobilis, which they can report to their Facebook page "Eco Sea Medulin."

In September 2020, Croatian scientists gathered at a conference aimed at expanding the Natura 2000 network. They sent out a stern warning regarding the future of the noble pen shell in the Mediterranean. The noble pen shell population has been in steep decline, and the scientists warn that, unless measures are initiated, we could lose the species forever. 

For more about lifestyle in Croatia, follow TCN's dedicated page.