(Glossogobius giuris) is a freshwater fish native to Mainit Lake. It is called “biya” in Tagalog and “white goby or tank goby” in English. The term “pidjanga” is also sometimes fondly used to refer to the Mainitnons, the people of the Municipality of Mainit, a town in Southern Philippines. This blog hopes to capture potentials of Migrants Pidjangas for the Development of our Town by attempting to document development issues, folk stories, and current concerns, about the Pidjanga — both the fish and the people.

The Horrors of JANITOR FISH

Marikina River, the Agusan Marsh (where Lake Mainit shares a watershed), and other freshwater bodies in the country has been devastated by this once friendly but now ferocious JANITOR FISH.


Have your say!

Thanks Monyx and Jo for this advocacy. Let's work hand in hand.

Post: Zimm (
Aug 4, 2007


Mindanao Bloggers said...

Hello! Pls don't forget to post your "I'm joining the Mindanao Bloggers Summit!" article on your blog. This is required for you to be able to receive your all-access pass to the Summit this October. In your post, pls link to Also, pls include the links to our sponsors:

Councilor Peter Laviña
Davao's Food Huntress
Lane Systems

We will check for your post, and once it's verified, we will send you an email containing your e-ticket. Thank you and see you in Davao this October!

Anonymous said...

Please take this suggestion in a constructive way.

I would like to correct the scientific name of pidjanga in Lake Mainit. The white goby or tank goby, Glossogobius giuris is not endemic in the country (you can browse the species information at Pidjanga is a correct local name but the scientific name is questionable. Herre (1953) listed many of the endemic and native species of Lake Mainit. I can post the list of fish species cited by Herre (1953)if I have time.

Marianne Hubilla-Travis
MS Fisheries Biology student
U.P. in the Visayas/
Agusan Marsh Volunteer Researcher

Anonymous said...

Regarding janitor fish...

There is a high possibility that the janitor fish from the Agusan Marsh will spread to Lake Mainit. While the janitor fish is not yet spreading to the bountiful lake, I suggest that the concerned LGUs should regularly monitor the fish catch and be strict enough in enforcing ordinances/laws regulating the aquatic resources in the lake.

Marianne Hubilla-Travis
MS Fisheries Biology student
U.P. in the Visayas/
Agusan Marsh Volunteer Researcher

Maradjao karadjao, Pilipinas!

Welcome to the online home of the Pidjangas from the Municipality of Mainit, Surigao del Norte, PHILIPPINES . Pidjanga, Pedianga, Pijanga, Pedjanga... amo ra ton... gikan sa ato danao! For comments and suggestion contact me at

CBCP News: Mining threatens 4th largest freshwater lake in PH

SEVEN are in the town of Mainit, Surigao del Norte... of the 15 exploration permits (EP) that the Regional Office 13 (CARAGA) of the Mines and Geosciences Bureau (MGB) of the Environment department approved as of June 30, 2010.

Read more at and Surigao Today.

If you want to support the protection of Lake Mainit, contact me at pidjangaATgmailDOTcom or 0917-800-4557. Zimm/Peter/Pidjanga

Mainit: Lungsod na Pinayangga

Mainit, Kami Muoli Ra

Surigao Song

Mainit, Our Paraiso