Help Protect
Maine Lakes

Maine Field Guide to Aquatic Phenomena

Every lake in Maine is a place of wonder and discovery. Lake Stewards of Maine has developed a convenient, reliable, go-to resource for all who love spending time on, in and around the lakes of Maine.

We welcome you to search a wide array of aquatic FLORA, FAUNA, and OTHER LAKE PHENOMENA from any of your devices, and urge you to join us in the ongoing development of this crowd-sourced compendium. The current catalog provides a great start, but still far from complete! With your help, the catalog will be continually updated with new information and photos, and expanded to include many new phenomena.

The app is now available as a mobile app in the Google Play Store, the Apple Store, and as an online catalog.


  • Do you have a photo or information to add to the existing catalog or a suggestion for expanding the existing new phenomena for inclusion in the catalog? Please use this form to share your ideas and/or suggested new content.
  • Have you found something suspicious? Please submit a picture and some information about your find using this form.
  • If you have feedback on or comments about the Maine Field Guide to Aquatic Phenomena, please select this form.




The Field Guide to Aquatic Phenomena was developed by Lake Stewards of Maine with additional funding support from the following partners (listed here in alphabetical order):

Maine Department of Environmental Protection
Maine Outdoor Heritage Fund
Onion Foundation


We are thankful to our generous colleagues who have graciously lent their time, effort and expertise to the development of this new resource. Once again listed in alphabetical order, we wish to acknowledge the following major contributors: Linda Bacon, Alan Baker (and UNH PhycoKey) Jacolyn Bailey, Francis Brautigaum, Dan Buckley, Don Cameron, Holly Ewing, Bob Henricks, Tom Murray, William Reid, Dennis Roberge, Catherine Schmitt, Matt Scott, and Ken Wagner.

Studies and publications made available free of charge to the public by Maine’s natural resource agencies: Maine Department of Agriculture, Conservation and Forestry; Maine Department of Inland Fisheries & Wildlife, and Maine Department of Environmental Protection have been a valuable source of information for this app. We hope users will join us in valuing the important contributions made by State Agency staff to our understanding and protection of Maine’s native ecosystems. Wikipedia has also been an excellent source of content (especially in the aquatic fauna category). For more information on a particular species, order or genus, as well as original source information, please visit (and financially support if you are able) Wikpedia’s free, multilingual open-collaborative, online encyclopedia. Other important resources utilized in the development of this app include: Bug Guide, Bugwood Center for Invasive Species; iNaturalist; National Oceanic and Atmospheric Administration; Senator George J. Mitchell Center for Sustainability Solutions; Society for Freshwater Science; UC Berkeley Natural History Museums (with special thanks to Timothy Burkhardt; William Flaxington; Joyce Gross and John White); University of Maine Cooperative Extension (with special thanks to Charles Armstrong); University of Maine, US Fish & Wildlife Service; US Geological Survey; US Great Lakes Environmental Research Laboratory.

We are also grateful to many other contributors that have given us permission to add their images in the app catalog. For individual sources, please see the notation that accompanies the image of interest.

This project has been—and will continue to be—a labor of love shared by LSM staff (recent past, and present). We wish to extend special thanks to the Lake Stewards of Maine team: Alison Cooney, Christine Guerette, Spencer Harriman, Roberta Hill, Steve Lambert, Jonnie Maloney, Tristan Taber, and Scott Williams.

ASAP Media Services is responsible for all of the magic that has taken place behind the scenes in order to convert an evolving concept and ever-growing piles of content into a user-friendly application. ASAP is a student-operated research and development organization at the University of Maine, Orono. The organization’s funding comes from implementing projects for both on and off campus clients (such as LSM). Students are responsible for all aspects of the development process: writing proposals, design, implementation, testing, and deployment. Working with the students and their faculty advisor (ASAP founder and director, Mike Scott) has truly been a pleasure. We thank them for their expertise and their unfailing support!

Privacy Policy

Lake Stewards of Maine is a 501(c)(3) non-profit organization. We created the Maine Field Guide to Aquatic Phenomena app as a Commercial, not-for-profit, app. This SERVICE is provided by Lake Stewards of Maine and is intended for use as is.
This page is used to inform visitors regarding our policies with the collection, use, and disclosure of Personal Information if anyone decided to use our Service.
If you choose to use our Service, then you agree to the collection and use of information in relation to this policy. The Personal Information that we collect is used for providing and improving the Service. Your information will not be shared with anyone except as described in this Privacy Policy.
The terms used in this Privacy Policy have the same meanings as in our Terms and Conditions, which is accessible at Maine Field Guide to Aquatic Phenomena unless otherwise defined in this Privacy Policy.

Information Collection and Use
Lake Stewards of Maine does not require users to provide with any personally identifiable information. The only data that will be collected by the app is whether or not a user has done the tutorial, and what version of the app the user has. This information will be retained by us and used as described in this privacy policy.
The app does use third party services that may collect information used to identify you.

Link to privacy policy of third party service providers used by the app:
Apple Privacy Policy
Google Play Services

Log Data
We want to inform you that whenever you use our Service, in a case of an error in the app we collect data and information (through third party products) on your phone called Log Data. This Log Data may include information such as your device Internet Protocol (“IP”) address, device name, operating system version, the configuration of the app when utilizing our Service, the time and date of your use of the Service, and other statistics.

Cookies are files with a small amount of data that are commonly used as anonymous unique identifiers. These are sent to your browser from the websites that you visit and are stored on your device’s internal memory.
This Service does not use these “cookies” explicitly. However, the app may use third party code and libraries that use “cookies” to collect information and improve their services. You have the option to either accept or refuse these cookies and know when a cookie is being sent to your device. If you choose to refuse our cookies, you may not be able to use some portions of this Service.

Service Providers
We may employ third-party companies and individuals due to the following reasons:
To facilitate our Service;
To provide the Service on our behalf;
To perform Service-related services; or
To assist us in analyzing how our Service is used.
We want to inform users of this Service that these third parties have access to your Personal Information. The reason is to perform the tasks assigned to them on our behalf. However, they are obligated not to disclose or use the information for any other purpose.

We value your trust in providing us your Personal Information, thus we are striving to use commercially acceptable means of protecting it. But remember that no method of transmission over the internet, or method of electronic storage is 100% secure and reliable, and we cannot guarantee its absolute security.

Links to Other Sites
This Service may contain links to other sites. If you click on a third-party link, you will be directed to that site. Note that these external sites are not operated by us. Therefore, we strongly advise you to review the Privacy Policy of these websites. We have no control over and assume no responsibility for the content, privacy policies, or practices of any third-party sites or services.

Children’s Privacy
These Services do not address anyone under the age of 13. We do not knowingly collect personally identifiable information from children under 13. In the case we discover that a child under 13 has provided us with personal information, we immediately delete this from our servers. If you are a parent or guardian and you are aware that your child has provided us with personal information, please contact us so that we will be able to do necessary actions.

Changes to This Privacy Policy
We may update our Privacy Policy from time to time. Thus, you are advised to review this page periodically for any changes. We will notify you of any changes by posting the new Privacy Policy on this page. These changes are effective immediately after they are posted on this page.

Contact Us
If you have any questions or suggestions about our Privacy Policy, do not hesitate to contact us at

This privacy policy page was created at and modified/generated by App Privacy Policy Generator.

Terms and Conditions

Last updated: July 25, 2019

Please read these Terms and Conditions (“Terms”, “Terms and Conditions”) carefully before using the Maine Field Guide to Aquatic Invaders mobile application (the “Service”) operated by Lake Stewards of Maine (“us”, “we”, or “our”).
Your access to and use of the Service is conditioned upon your acceptance of and compliance with these Terms. These Terms apply to all visitors, users and others who wish to access or use the Service.
By accessing or using the Service you agree to be bound by these Terms. If you disagree with any part of the terms then you do not have permission to access the Service.

Intellectual Property
The Service and its original content, features and functionality are and will remain the exclusive property of Lake Stewards of Maine and its licensors. The Service is protected by copyright, trademark, and other laws of both the United States and foreign countries. Our trademarks and trade dress may not be used in connection with any product or service without the prior written consent of Lake Stewards of Maine.

Links to Other Web Sites
Our Service may contain links to third party web sites or services that are not owned or controlled by Lake Stewards of Maine
Lake Stewards of Maine has no control over, and assumes no responsibility for the content, privacy policies, or practices of any third party web sites or services. We do not warrant the offerings of any of these entities/individuals or their websites.
You acknowledge and agree that Lake Stewards of Maine shall not be responsible or liable, directly or indirectly, for any damage or loss caused or alleged to be caused by or in connection with use of or reliance on any such content, goods or services available on or through any such third party web sites or services.
We strongly advise you to read the terms and conditions and privacy policies of any third party web sites or services that you visit.

We may terminate or suspend your access to the Service immediately, without prior notice or liability, under our sole discretion, for any reason whatsoever and without limitation, including but not limited to a breach of the Terms.
All provisions of the Terms which by their nature should survive termination shall survive termination, including, without limitation, ownership provisions, warranty disclaimers, indemnity and limitations of liability.

You agree to defend, indemnify and hold harmless Lake Stewards of Maine and its licensee and licensors, and their employees, contractors, agents, officers and directors, from and against any and all claims, damages, obligations, losses, liabilities, costs or debt, and expenses (including but not limited to attorney’s fees), resulting from or arising out of a) your use and access of the Service, or b) a breach of these Terms.

Limitation of Liability
In no event shall Lake Stewards of Maine, nor its directors, employees, partners, agents, suppliers, or affiliates, be liable for any indirect, incidental, special, consequential or punitive damages, including without limitation, loss of profits, data, use, goodwill, or other intangible losses, resulting from (i) your access to or use of or inability to access or use the Service; (ii) any conduct or content of any third party on the Service; (iii) any content obtained from the Service; and (iv) unauthorized access, use or alteration of your transmissions or content, whether based on warranty, contract, tort (including negligence) or any other legal theory, whether or not we have been informed of the possibility of such damage, and even if a remedy set forth herein is found to have failed of its essential purpose.

Your use of the Service is at your sole risk. The Service is provided on an “AS IS” and “AS AVAILABLE” basis. The Service is provided without warranties of any kind, whether express or implied, including, but not limited to, implied warranties of merchantability, fitness for a particular purpose, non-infringement or course of performance.
Lake Stewards of Maine its subsidiaries, affiliates, and its licensors do not warrant that a) the Service will function uninterrupted, secure or available at any particular time or location; b) any errors or defects will be corrected; c) the Service is free of viruses or other harmful components; or d) the results of using the Service will meet your requirements.

Some jurisdictions do not allow the exclusion of certain warranties or the exclusion or limitation of liability for consequential or incidental damages, so the limitations above may not apply to you.

Governing Law
These Terms shall be governed and construed in accordance with the laws of Maine, United States, without regard to its conflict of law provisions.
Our failure to enforce any right or provision of these Terms will not be considered a waiver of those rights. If any provision of these Terms is held to be invalid or unenforceable by a court, the remaining provisions of these Terms will remain in effect. These Terms constitute the entire agreement between us regarding our Service, and supersede and replace any prior agreements we might have had between us regarding the Service.

We reserve the right, at our sole discretion, to modify or replace these Terms at any time. If a revision is material we will provide at least 15-days notice prior to any new terms taking effect. What constitutes a material change will be determined at our sole discretion.
By continuing to access or use our Service after any revisions become effective, you agree to be bound by the revised terms. If you do not agree to the new terms, you are no longer authorized to use the Service.

Contact Us
If you have any questions about these Terms, please contact us at

Contact information

Contact us at:     Phone: 207-783-7733       Email:

Hours of visitation at LSM Office:
  Mondays 9:00am - 3:00pm         Wednesdays 9:00am - 3:00pm
  Thursdays 11:00am - 3:00pm       Or by appointment

Our Mission

Lake Stewards of Maine (LSM) works to protect Maine lakes and to promote lake stewardship through widespread citizen participation in the gathering and dissemination of credible scientific information pertaining to lake health.


LSM is a non-profit 501(c)(3) organization committed to the collection of information pertaining to lake water quality. For 50 years, trained volunteers throughout Maine have donated their time so that we may all learn more about one of Maine’s most beautiful and important resources — our lakes.