If you're anything like me, your beachcombing trips end with a pocket full of shark teeth, chipped scallop shells, and tumbled sea glass shards, and a vague plan to "figure out what half of this stuff is later." For years, I tossed my finds in a jar on my desk, only pulling them out when friends asked to see my "treasures." That changed last fall, when I posted a photo of a weird, triangular fossil tooth I'd found at Assateague Island National Seashore to iNaturalist, just for fun. A week later, a paleontology grad student from the University of Maryland reached out: the tooth belonged to an extinct sawfish, and it was the first recorded find of that species in Maryland coastal waters in 30 years. That tiny, beat-up tooth was now part of a peer-reviewed study on ancient sawfish migration patterns.
That's the magic of citizen science: your random beach finds aren't just cool trinkets. They're data points that help researchers track coastal erosion, invasive species spread, climate change impacts, and even ancient marine ecosystems. But only if you record and share them the right way.
Step 1: Gather Critical Context Before You Toss That Find in Your Bucket
The biggest mistake new beachcombers make is waiting until they get home to log their finds, when they've already forgotten the exact spot, tide stage, and tiny details that make the observation useful for science. Before you leave the beach, jot down (or voice memo) these key details, no fancy gear required:
- Exact GPS coordinates : Your phone's built-in maps app can drop a pin in 2 seconds flat. Even a rough pin is better than "somewhere south of the pier."
- Date, time, and tide stage : Low-tide vs. high-tide finds tell researchers how sediment moves along the shore, and when certain species or debris wash ashore.
- Micro-habitat details : Was the find in the wrack line, buried 6 inches under wet sand, stuck to a rock jetty, or tangled in a patch of sargassum? If you found multiple specimens of the same item in a small area, note that too--- a cluster of rare shells might signal a new local spawning ground for a species.
- Unedited, in-focus photos : Snap a top-down shot, a side shot, and a photo with a common object (a quarter, your keys) next to it for scale. Skip the filters, and skip scrubbing the find clean first: barnacles, sediment, or even small bits of attached seaweed can be key clues for researchers trying to ID the specimen or track where it came from.
- A quick rule reminder: Never remove fossils, shells, or other specimens from protected areas (like state parks or wildlife refuges) if collection is prohibited--- photograph them and log the find instead, that data is still just as valuable. If you find a deceased sea turtle hatchling or injured seabird, note the location and report it to local wildlife authorities in addition to logging it on citizen science platforms.
Step 2: Pick the Right Platform for Your Finds (Don't Just Post to Instagram)
Not all platforms are built for scientific data, and posting to random social media means your find will probably get lost in a feed, never to be seen by researchers who could actually use it. Match your finds to the right vetted tool:
- iNaturalist : The all-around gold standard for beachcombing finds. It's free, has a global community of experts who will help ID your finds for free, and all research-grade observations are added to global biodiversity databases used by the IUCN, NOAA, and universities. It's perfect for shells, shark teeth, fossils, sea glass, live marine creatures, and even invasive species you spot on the beach. There are even dedicated iNaturalist projects for Gulf Coast shark tooth hunters, Atlantic sea glass trackers, and coastal invasive species monitors, so you can contribute to focused studies.
- NOAA Marine Debris Tracker : If your finds include plastic pollution, ghost fishing gear, or other marine debris, this app lets you log the type, location, and amount of trash you find, data that NOAA uses to track pollution hotspots and plan clean-up efforts.
- CoastSnap : If you find evidence of coastal change---eroded cliffs, newly exposed fossil beds, or large piles of shells that indicate shifting currents---this citizen science project lets you upload time-stamped photos of the shoreline to track erosion and sea level rise over time.
- Local museum or research portals : Many regional natural history museums have their own citizen science submission forms for rare finds. The Florida Museum of Natural History has a dedicated shark tooth submission portal for Gulf Coast finds, for example, and many coastal university paleontology departments accept fossil and shell records from local beachcombers.
- Pro tip: Most of these apps have offline mode, so you can log finds on remote beaches with no cell service, and upload them later when you're back in range.
Step 3: Build a No-Stress Cataloguing Workflow You'll Actually Stick To
A lot of people try to log every single tiny coquina shell they find, burn out in a week, and never do citizen science again. Make it sustainable with this simple system:
- Sort your finds into tiers first: Common, unremarkable finds (standard bull shark teeth, common coquina shells) only need a quick group photo and a single log entry for the day, no need to catalogue each one individually unless you notice something unusual (a weird color, an odd chip pattern you've never seen before).
- Interesting finds (a rare shell, a fossil, a shark tooth from an extinct species) get a full, detailed log with all the context you gathered on the beach, plus close-up photos of any unique features.
- Rare, scientifically significant finds (a 5-inch Megalodon tooth, a species that's never been recorded in your state) get a full log, plus a direct message to the relevant research team or museum---they'll often help you verify the find and add it to official records.
- Batch your work: Don't try to log finds the second you get home from the beach. Set aside 30 minutes once a week to sort through your bucket, take photos, and upload entries. Most platforms let you save drafts, so you can jot down notes on your phone while you're sorting, and upload them later when you have Wi-Fi.
- Keep a personal backup log: Use a free spreadsheet or notes app to keep a personal copy of your records, with your own notes (like "found this after the 2024 nor'easter, same spot I found the sawfish tooth last year") that you don't need to share publicly. That way, you can track your own finds over time, too.
Pro Tips to Make Your Shared Finds as Useful as Possible for Researchers
A vague post with no context is almost useless for scientific research. These small tweaks will make your observations count:
- Always attach precise location data: Most platforms let you attach GPS coordinates automatically when you upload a photo, so don't skip that step. Vague location notes like "Virginia Beach" are almost useless for researchers tracking small-scale population or erosion changes.
- Add context that isn't obvious from the photo: Instead of just posting a photo of a shell with the caption "found this on the beach," add notes like "found 17 of these in a 15-foot stretch of wrack line 2 days after Hurricane Debby passed" or "this shell had 3 small zebra mussels attached to the hinge, which I haven't seen on this species before." Those small details are often the most valuable part of your observation.
- Be honest about uncertainty: If you're not sure what your find is, mark it as "unknown" or ask for ID help from the platform's community before tagging it as a specific species. Wrong IDs can throw off entire research datasets, so it's better to leave it unconfirmed than guess.
- Tag relevant research groups: Most platforms let you tag local universities, museums, or research projects in your observation. If you find a rare shark tooth, tag your state's paleontology department; if you find an invasive species, tag your state's invasive species program. That way, the right people see your find right away, instead of it getting lost in thousands of other observations.
- If you share your finds on social media too, add a link to the full citizen science record in your caption. That way, people who are interested can see the full context, and researchers who stumble on your post can find the official data entry.
Common Mistakes That Make Your Finds Useless for Science
- Oversharing sensitive location data : If you find a rare, fragile site (like an eroding cliff full of fossils, or a sea turtle nesting beach where you're finding lots of rare shells), don't post the exact GPS coordinates publicly. Looters or large crowds can damage these sites, so share the general region, and send the exact coordinates directly to the relevant research team instead.
- Cleaning or modifying finds before photographing them : Scrubbing off barnacles, chipping away sediment, or even rearranging attached debris can erase key details that researchers need to ID the specimen or track where it came from. Take your photos first, then clean the find later if you want to add it to your personal collection.
- Assuming "common" finds aren't worth recording : Even common species data is incredibly valuable for tracking long-term population changes. If you notice you're finding 50% fewer common scallop shells this year than you did 5 years ago, that's a data point that could signal a problem with local water quality or overfishing.
- Ignoring "negative data": If you spend 2 hours beachcombing in an area where invasive zebra mussels were reported last month, and you don't find a single one, that's useful data too! Log that you searched the area and found no specimens---it helps researchers track the spread (or decline) of invasive species.
Last month, I found a bright purple fossil shark tooth, an extremely rare find caused by trace mineral impurities that replaced the original enamel over millions of years. I posted it to iNaturalist, and a researcher from the Gulf Coast Fossil Club reached out, asking if they could include it in a study on mineral variation in fossilized shark teeth. I never would have known that my random beach finds could contribute to actual research, but now I log every single trip, even the days where I only find broken shells. It doesn't take much time, and it turns a solo hobby into something that helps protect the coasts we all love. Next time you head to the beach, bring your phone, drop a pin when you find something cool, and share it with the world. You never know what tiny piece of history you're holding.