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ReefBase Reef Quiz

Play the ReefBase Reefing Quiz!

20 Questions from easy to not-so-easy. Have fun & good luck!

Example Question: Iron oxide hydroxide is the chemical name of which product:


ReefBase is a Marine Fish keeping & Coral Reef Aquarist Community Forum based in the UK. Join ReefBase for help & advice or to contribute your own knowledge & experience of keeping a Marine Coral Reef Aquarium.

Create an account (It's quick & easy)



If you're new to ReefBase, come and introduce yourself.

Last post by HK_Fuey
in Re: Phil's intro

ReefBase Lounge

General off-topic chat and discussions. Be yourself & join-in.

Last post by HK_Fuey
in Re: The Grand Tour


A general board for the discussion of freshwater fish, tanks and freshwater specific equipment, such as CO2 kits, etc.

Last post by fr499y
in Re: Superglue in tank

Members Tanks

Browse our members' tank threads, view progress and pictures, or create your own thread to track the progress of your own reef aquarium.

Last post by glennf
in Re: GlennF's DSR tank

Tank of the month

Monthly competitions on member's tanks. Enter pictures of your tank and / or vote on others'.

Last post by Marty
in Re: TOTM September 2016 - voting

General Reef Keeping

General Reef Discussions

General non-specialised reefkeeping questions & discussions.

Last post by HK_Fuey
in Re: People carving their names onto corals on a reef?!

Beginners Questions

If you're new to the hobby, please ask any questions you have, rather than making the mistakes we've all made.

Last post by Buttonmoon
in New old tank set up


All reef chemistry related posts should go in here.

Last post by rhys.hill66
in Re: Test Kits

Reefing News

Post links or information on any related reefing news.

Last post by HK_Fuey
in Euphyllia - same but different

Stunning Reef Tanks

A collection of the most beautiful reef aquariums from anywhere on the net. Post links and a brief summary of what captivated you most by the tank. Inspiration for us all.

Last post by fr499y
in Re: Can’t find thread..fantastic tanks but high No3 50+


General competitions on member chosen subjects.

Last post by HK_Fuey
in Re: Most charaterful creature vote


Reefbase ID database

A database of common living things found in our reef tanks

Last post by Gav
in [BAD] Teddy Bear Crab

ID needed

Need help identifying something? Post a photo, video, and/or description and we'll do our best to help you out.

Last post by mccolganm4
in Re: Please identify this

Marine Fish

General Marine Fish

A general board for all Marine fish, for Marine Fish identification, and general discussion.

Last post by Nottslad
in Re: Male Bird Mouth Wrasse

Marine Fish Diseases

A board for threads related to marine fish diseases including; White Spot (Ich), Brooklynellosis (Anemonefish Disease), Marine velvet, black spot, HLLE, Fin Rot, etc. Their diagnosis and treatment.

Last post by Matt_toynton
in Re: Dark blemish on Naso Tang

Clownfish & Damselfish

Clownfish and other Damselfish, including Clarkii Clownfish, Common Clownfish (Nemo), Skunk Clownfish, Electric Blue Damselfish, Domino Damselfish are in this category.

Last post by Gofro
in Re: Paired couple now fighting

Tangs / Surgeonfish

Discussions regarding Tangs aka Surgeonfish. Fish such as Yellow Tangs, Regal Tangs (Dory), Naso Tangs, Clown Tangs, etc fall into this category.

Last post by HK_Fuey
in Re: Gutted!! Had to rehome my beautiful sailfin

Angelfish (Large & Dwarf)

For topics about Angelfish & Dwarf Angelfish. For Fish such as the Queen Angelfish, Emperor Angelfish, Coral Beauty & Flame Angel.

Last post by Marty
in Re: Emporer anglefish


General Corals

A general board for all Corals & Anemones, for Coral identification, and general discussion.

Last post by HK_Fuey
in Re: Show us your favourite coral

Soft Corals

Soft corals. Corals without a skeleton. These include Leather Corals, Pulsing Xenia, Zoanthids, Mushrooms, etc.

Last post by Johnle-hane
in Re: Anemone split today!! Advice urgent plz

LPS Corals

Large polyp stony corals. Any corals with a calcium based skeleton, and large polyps which extend out to completely conceal the skeleton beneath.

Last post by fossilguytom
in Re: Duncans

SPS Corals

Small polyp stony corals. More advanced corals which have calcium based skeletons and small polyps.

Last post by Paddone
in Re: How to you encourage Montipora digitata to branch mo...

Azooxanthellate / Non-Photosynthetic Corals

Azooxanthellate or non-photosynthetic corals do not require much if any light to survive. They include Gorgonians and Sun Corals.

Last post by Debbiem
in Re: Whats happening to my sun coral?


Marine Invertebrates

A board for marine reef invertebrates.

Last post by fr499y
in Re: Tuxedo Urchin With A Dinner Jacket

Marine Molluscs

Marine gastropod molluscs including; Seahares, Turbo snails, Nassarius snails, and predatory snails such as Sundial snails & some Nudibranchs.

Last post by Matt_toynton
in Re: Finding dead Conch snails

Marine Crustaceans

Marine Crustaceans as in Porcelain crabs, Mithrax crabs, cleaner shrimps, blood shrimps, boxer shrimps, etc.

Last post by daniel04m
in Re: Why can't I keep cleaner shrimp

Marine Hardware


Discussions surrounding marine & reef lighting, Metal Halides, CFLs, T5s or LEDs.

Last post by Johnle-hane
in Re: Can’t conect to LEDzeal app

Pumps and powerheads

Pumps for returns/skimmers/reactors/etc. & powerheads/wavemakers/etc. You get the idea ;-)

Last post by Asco1104
in Re: AI Nero 5 pump


A board for more specialised equipment such as dosing pumps, kalkwasser stirrers, calcium reactors, etc.

Last post by fr499y
in Re: External heaters


Marine Hardware Do-It-Yourself. A board containing topics about building & customising your own equipment.

Last post by Gav
in Re: Lazy water change


Discussions about Filtration, protein skimmers, uv sterilisation, ozone usage, nitrate reactors, biopellets, etc.

Last post by Matt_toynton
in Re: New tank - looking for a skimmer

Reef Photography


Show off your pictures of your reef.

Last post by Johnle-hane
in Re: Here is my tank

Photography Advice & Tips

If you need help getting good photos of your marine tank, fish or corals. Ask for advice here, please include camera model, as it helps to understand what features are available to you.

Last post by Mike
in Re: Mobile webpage photo uploading


Free to a good home

A board to advertise things you're giving away to fellow reefers.

Last post by fishface
in Re: Free to a good home

For sale

A board to advertise your reefing equipment and livestock for sale.

Last post by daniel04m
in Re: For Sale

Swap Shop

A swap shop. A place for ReefBase members to offer frags, Corals, Zoanthids, Fish or equipment in exchange for other items.

Last post by Deano88
in Swap snowflake eel


A request board for marine fish, corals or equipment.

Last post by Matt_toynton
in Equipment wanted

Reef Keeping Suppliers

Become a Supplier

There's no sponsorship model on ReefBase. For members it means there's no bias towards vendors who are supporting the forum financially, so everyone is free to talk openly about products, whether they're a supplier here or not. For you it means there's no fee, and you can advertise your products or service and interact with UK Reefkeeping hobbyists.


iQuatics Online is the UK’s leading supplier of innovative aquarium lighting products.

Last post by iQuatics-Online
in Universal Hanging Bar Offer

Reef Perfect

Reef Perfect is the UK’s leading supplier of aquarium cooling and control products for private and commercial customers alike.

Last post by Mike
in Re: Hows it going ReefPerfect?


Fistafiltration specialise in acrylic aquarium manufacture, and filtration such as sumps and reactors. FistaFiltration has been supplying acrylic tanks and products for over 20 years.

Last post by fizzy
in Re: fish display


MailOrderCorals are one of the leading suppliers of Marine Corals and Inverts in the UK. With over 4,000 Corals & Inverts ready for delivery direct to your door with our live arrival guarantee.

Last post by T-Bone Tyrone
in Re: Holiday

RO World

A UK supplier of high quality aquarium RO units. With a vast range of reverse osmosis accessories at unbeatable prices with quick delivery.

Last post by Asco1104
in Re: Cartridges needed for Kent Marine Hi-S (the Maxxima ...


Fishmansfrags has been a market leader of UK mail order marine corals, frags and livestock since 2005 and is possibly the most popular and best priced retailer of marine corals and critters online today!

Last post by fishmansfrags


Reefphyto Ltd is a reliable source of quality Live Phytoplankton, Rotifers, Copepods (Zooplankton) all cultured and grown at our premises in the UK.

Last post by HK_Fuey
in Re: Live Food Discount for ReefBase Forum Subscribers


We are suppliers of marine fish, coral, inverts and tank equipment. Using the equipment we also sell helps us to understand the customers requirements in maintaining a healthy aquarium.

Last post by Marine_Boy
in Lights losing time

Aquarium Plumbing Ltd

We specialise in UPVC aquarium plumbing and fittings. All of our aquarium plumbing is fish and invert safe and can be used in fresh or salt water systems. We supply imperial and metric systems which are compatible with Deltec, Aqua Medic and any other European equipment.

Last post by jordanweasel
in Re: Weir comb


Our marine products are both high quality and user friendly and have just one goal - to produce a successful healthy marine aquarium with stunningly beautiful corals and fish

Last post by HK_Fuey
in Re: Colombo - Bacto balls


AbyssWare offer different options of fully customisable light systems and platforms in order to meet customer's detailed requirements, optimal lighting, excellent design and maximum reliability. Off-the-shelf lighting systems, custom spectrum and power, custom look and design features of lights, all features and components used are highest quality, efficiency and reliability.

Last post by db75Reef
in Re: SAPPHIRE V2 - development

Hidden Gem Aquatics

Our specialty is in the propagation of live coral for saltwater aquarium enthusiasts. A reef aquarium allows us to view, in our own homes, a multitude of beautiful life forms, providing a window to an underwater world we may not otherwise see. Our Beautiful Marine Corals will help any enthusiast create the most stunning underwater worlds at affordable prices.

Last post by danHGA
in Hidden Gem Aquatics

Coral Cultivations

Coral Cultivations is a new frag farm based in Hull, East Yorkshire. We specialise in soft coral frags - including many zoo species including some rare ones, plus various soft corals, Xenias and star polyps. We specialise in offering high quality, affordable zoo and soft coral packs ideal for beginners to the hobby, as well as offering a selection of high end zoo species.

Last post by stevec
in Discount for Reefbase Members!

Reefing Tools & Articles


A board for how-to guides on any area of the reefkeeping hobby.

Last post by T-Bone Tyrone
in Re: How to wire an STC1000 temperature controller with 2...


A board for polls to appear on homepage

Last post by T-Bone Tyrone
in Re: How often do you feed?


Dosing calculators, tank size calculators, etc.

Last post by Carol
in Re: Aquatic log


Useful articles on the reefkeeping hobby.

Last post by HK_Fuey

Recent Topics

New old tank set up by Buttonmoon

For Sale by daniel04m

Curve 5 skimmer by Matt_toynton

New tank - looking for a skimmer by Matt_toynton

People carving their names onto corals on a reef?! by HK_Fuey

Example of not harvesting a waterfall soon enough by Santa Monica

GlennF's DSR tank by glennf

Anyone use a Tds dual inline tds monitor by Mayo

Please identify this by mccolganm4

fishless cycling by HK_Fuey

Water tests and Water Changes by HK_Fuey

What's this? by HK_Fuey

New tank by HK_Fuey

Wavemaker advice by ajm83

Phil's intro by HK_Fuey

Anemones and sps by afcajax73

Male Bird Mouth Wrasse by Nottslad

Hello by Jo_lo1978

Andys 52L sea evo by afcajax73

Candy cane by Amo Manik

Can’t conect to LEDzeal app by Johnle-hane

Identify please by HK_Fuey

SELLING UP by andysoho

Nano by Duncindevon

Hello New Here by Duncindevon

Adding new live stock by HK_Fuey

Superglue in tank by fr499y

Evolution of a reef by The land shark

Any body know what this is by ajm83

Book - Aquarium Corals .. selection, husbandry... by Eric H Borneman... SOLD by tightlines

After a really good clean by Johnle-hane

Red Sea Max E170 with full sump upgrade. by Phishboi

What do I have by AaronUK84

HELP NEEDED ASAP iLumenAir v2 900 by Adam Smith

Coral by mccolganm4

Lazy water change by Gav

The Grand Tour by HK_Fuey

Lighting advice please by Johnle-hane

just saying hello by HK_Fuey

Hello there by HK_Fuey

Show us your favourite coral by HK_Fuey

Help with tank and coral by HK_Fuey

Amo's Tank thread by Amo Manik

Dogface buffer snacking on my anemone by Johnle-hane

Euphyllia - same but different by HK_Fuey

Reef Keeping News

Euphyllia - same but different Jan 5, 2019 3:41:39 pm by HK_Fuey
Makes sense why torch corals sting other euphyllia now...

Read More
Piggybacking brittlestar Jan 3, 2019 9:49:01 am by HK_Fuey

Piggybacking brittlestar
Read More
A selection of micromussa lordhowensis from Asia Nov 17, 2018 10:27:25 am by Gav
A selection of micromussa lordhowensis from asia
Read More
seriatopora-dendritica Nov 17, 2018 10:20:44 am by Gav
Seriatopora dendritica, Birdnest Coral Wishes it was an Acropora!
Read More
Palau to ban sunscreen products to protect reefs Nov 3, 2018 9:23:44 pm by Gav
Palau to ban sunscreen products to protect reefs

Read More
Up and coming ATS from aquaristik Oct 26, 2018 9:47:28 am by Gav
Read More
GBR shows signs of recovery Sep 10, 2018 10:20:30 pm by HK_Fuey
Fantastic news...
Read More
100% cure for aefw Sep 4, 2018 4:02:43 pm by HK_Fuey

That's right ladies and gentlem
Read More
Killing rats can save coral reefs Jul 13, 2018 11:48:58 am by Gav
Killing rats can save coral reefs: Dal researcher
Read More