Coral Photography for Online Stores: True Color Under Blue Light

A customer opens your listing, sees a frag glowing orange against deep blue, and buys it. The next day it’s out of the bag under their lights and it looks brown and green. The coral is healthy and it’s the same piece. The photo showed a color it only has under heavy actinic light, and now you’re answering an email that starts with “this isn’t what I ordered.”

You can fix most of this with cheap gear and a routine you repeat every time you shoot.

Why coral photos look wrong under blue light

Reef LEDs and T5s put out a lot of blue and violet light, because that’s what makes corals fluoresce. Phone cameras are tuned to make a white shirt look white. When nearly everything in the frame is blue, auto white balance tries to correct it and lands somewhere odd, or it leaves you with a purple wash. Either way the photo doesn’t match what the buyer sees at home, where they may run a whiter spectrum than you do.

A store has two honest options. Show the coral the way it looks under a typical reef spectrum, or show it under blue and say so in the listing. Trouble starts when the saturation gets pushed until the frag looks like a highlighter and nobody says how the photo was taken.

Gear worth buying

• An orange or yellow filter for your phone. Clip-on filters made for reef tanks cancel a lot of the blue before the camera sees it, so auto white balance has something sane to work with. For a phone, this is the cheapest fix with the biggest visible difference.
• A tripod or a phone clamp. Under dim blue light the phone picks a slow shutter speed, and a steady phone is the difference between sharp polyps and mush.
• A photo tank. A small tank or acrylic box with its own light and water from your system, used only for photos. You move each frag in, shoot it and move it back, so every listing gets the same background and the same light.
• A top-down viewer if you sell zoanthids, chalices or LPS that buyers judge from above. It sits on the surface so you shoot through flat water instead of ripples.

A shooting routine to repeat every time

1. Switch the lights to a photo preset. Most reef LED apps let you save one. Make it with enough white that colors read true, use it for every shoot, and write the settings down so whoever shoots next week uses the same ones.
2. Turn off the pumps and powerheads for a few minutes. Flow causes motion blur and kicks up particles that show as specks. A feed mode on your controller can do this and turn everything back on by itself.
3. Turn off the room lights and close the blinds. Reflections on the glass are easier to prevent than to edit out. If you shoot through the side, put the lens against the glass and keep it square to the pane.
4. Fill the frame with the coral. Move the phone closer instead of using digital zoom, tap to focus on the colony and lock exposure if your phone allows it.
5. Take a wide shot and a close-up. The wide shot shows size against the plug or a small ruler. The close-up shows the polyp color people are paying for.
6. Shoot a short video when a still won’t do the coral justice. Torches and hammers are hard to judge from one photo because so much of their appeal is the movement. Ten steady seconds is plenty.

Camera settings on a phone

If your phone has a Pro or manual mode, which many Android phones do, set the white balance by hand instead of leaving it on auto. Reef photographers usually start with a high Kelvin setting, somewhere between 10,000K and 20,000K, to pull the blue out, then adjust by eye until a white frag plug looks white.

The built-in iPhone camera doesn’t have a Kelvin slider. On an iPhone you can rely on the orange filter, use a third-party camera app with manual white balance, or correct the photo afterward in an editor like Lightroom Mobile or Snapseed.

If you plan to edit, shoot in RAW (ProRAW on Pro-model iPhones, or RAW in Pro mode on many Android phones). RAW files keep more color information, so a white balance fix doesn’t fall apart.

Editing without misleading buyers

• Fix white balance first, then exposure. White balance alone solves most of the color problem.
• Leave saturation and vibrance close to where they started. If you push them on every photo, all your frags look the same neon and a buyer can’t tell a premium piece from a common one.
• Don’t crop out receding tissue or clone algae off the plug. The buyer sees it the day it arrives, and you end up explaining it in a refund email.
• Save your edit as a preset. Lightroom Mobile lets you do this, so every photo from the same shoot gets the same correction.

Tell buyers how the photo was taken

One line under the gallery can head off a lot of “it doesn’t look like the photo” messages. Something like: “Photographed under blue-heavy LEDs with an orange filter. Color will vary with your lighting.” Put it in the product template so it’s on every listing.

If it’s a WYSIWYG listing, say the photo is the exact piece you’ll ship. If it’s a grown-out stock photo, say that too, and give the rough size of the frag that goes in the bag. We went through the store setup for one-of-a-kind pieces in our post on WYSIWYG coral listings.

Getting photos onto your store without slowing it down

Photos come off a phone at a few megabytes each. Upload a few hundred of those to your shop and the category pages crawl, especially for buyers on cellular. Resize before you upload (around 2,000 pixels on the long side is plenty for zoom), compress them, and serve WebP where your platform or an image plugin supports it. We covered the speed side in more detail in why your coral website is slow.

Name and describe your images too. A file called orange-green-zoanthid-frag.jpg tells Google more than IMG_4482.jpg does, and alt text like “orange and green zoanthid frag on a ceramic plug, about eight polyps” helps people using screen readers as well as search. Google’s own image guidelines call alt text the most important piece of metadata it uses to understand an image, and they say to keep it accurate and skip the keyword stuffing.

Common mistakes

• Shooting each batch under different light, so the shop looks like it was stocked by five different stores.
• Using a photo of the mother colony for frags cut from it without saying so.
• Leaving the pumps running and listing a blurry photo of an expensive piece.
• Uploading full-size phone photos straight to product pages.
• No note about lighting, so the buyer’s first comparison is your photo against the coral in the bag.

FAQ

What’s the best light setting for coral photos?

The one you can repeat. A mix with some white in it shows the most accurate color, and full actinic shows the most glow. Pick one, save it as a preset, and say in the listing which one you used.

Do I need a real camera to sell coral online?

No. A recent phone with an orange filter, a tripod and a steady routine covers most frag listings. A dedicated camera with a macro lens helps if you sell high-end pieces where buyers zoom in on individual polyps.

Should I edit coral photos?

Yes, lightly. Correct white balance and exposure so the photo matches what you see in the tank. Skip saturation boosts and anything that hides damage or algae.

How many photos should a coral listing have?

For a WYSIWYG piece, a wide shot with something for scale and a close-up, plus a short video for corals that move a lot. For grown-out stock, one clear photo with a note that it’s a representative photo is enough.

Can I use photos from the vendor I bought the coral from?

Only with their permission, and only on stock listings where you say it’s a representative photo. On a WYSIWYG listing the photo has to be the piece you’re shipping.

Need help with your coral store’s photos and product pages?

Last Wave Technology builds and fixes online stores for small businesses, including coral farms, frag sellers and reef shops. We set up product galleries, image compression, WYSIWYG listings and the product templates your photos sit in. We built and maintain the website for SoFlow Rubio’s Corals, a coral wholesaler that releases a new WYSIWYG album for licensed retail stores every Monday. If your coral looks great in the tank and wrong on your site, book a free consultation or email us at manage@lastwavetechnology.com.