About Fish and Invertebrates
By Stan & Debbie Hauter, About.com Guides to Saltwater Aquariums
From aquarium care to selection information, to nutrition, diseases, health issues and more, here's your gateway to learn all about saltwater fishes, corals and other invertebrates in aquariums.
- Fish Compatibility & Care
- Fish Species Facts & Information
- Coral Facts & Information
- Reef Safe
- Invertebrate Information
- Fish and Coral Diseases
- Fish & Invert Nutrition
- Selecting & Buying Livestock
- Moving & Transporting Aquarium Animals
Fish Compatibility & Care
Learn how to determine which fish will get along together in your tank, which won't and how to care for the ones that do.
- Acclimating Fish & Invertebrate
- Fish Care Ratings Chart
- Fish Compatibility - Types of Aggressive Behavior
- Fish Compatibility - Food Competition Behavior
- Fish Compatibility - Aggressive Territorial Behavior
- Top 8 Saltwater Aquarium Myths
- What to Look for When Purchasing Fish
- FAQ - How Many Fish Can I Put in my Tank?
Fish Species Facts & Information
Here is a collection of species photo, identificaton, characteristic, compatibility, feeding, aquarium care, and more information to learn about these fishes.
- Angelfish
- Blennies
- Box & Cowfish
- Butterflyfish
- Chromis & Damselfish
- Clownfish/Anemonefish
- Eels
- Gobies
- Grouper & Sea Bass
- Hawkfish
- Lion & Scorpionfish
- Mandarinfish & Dragonettes
- Parrotfish
- Porcupine & Pufferfish
- Seahorse & Pipefish
- Sharks
- Stingrays & Skates
- Tangs & Surgeonfish
- Triggerfishes
- Wrasse Fishes
Coral Facts & Information
Facts & information about how to care for the corals in your saltwater reef aquarium.
- 15 Easy Corals
- Soft Coral Species Facts & Information
- Hard Coral Species Facts & Information
- Coral Competition - Turf Wars in Reef Tanks
- Why Corals Change Color
- More Coral Health Issues
- What Do I Feed My Corals?
- More About Coral Nutrition
- Top Phosphate Removing Products
- Top Nitrate Adsorbing Products
- Reef Tank Temperatures - How High is Too High?
- Reef System Lighting - What To Buy and Why
- Coral Lighting
- Tank Lighting - Reef Systems
- What is Coral Bleaching, and Why Does it Occur?
- What Do Reef Corals Require to Survive?
- Why and How Leather Corals Shed
Reef Safe

Even if you don't currently have a reef tank, selecting only reef safe animals for your Fish Only or Fish Only with Live Rock tank is a good idea. Reef safe fish and invertebrates will live peacefully together and won't destroy your corals when you decide to add them to your aquarium.
- Reef Safe Fish
- Reef Safe Tank Janitors
- Reef Safe Tank Janitors - Part 2
- Reef Safe Invertebrates
- Reef Safe Angelfish
- Reef Safe Small Gobies
- Reef Safe Shrimp Gobies
- Reef Safe Sand Sifting Gobies
- Reef Safe Hermit Crabs
- Reef Safe Rock & Glass Cleaners
Invertebrate Information

Facts and information about how to care for the invertebrates in your saltwater aquarium. From tips on which invertebrates are considered to be reef safe to information about individual saltwater invertebrate species.
- Abalone Profiles
- Anemone Profiles
- Cephalapod Profiles
- Clam Profiles
- Copepod & Amphipod Profiles
- Crab Profiles
- Hermit Crab Profiles
- Invertebrate Information Index
- Jellyfish Profiles
- Marine Worm Profiles
- Nudibranch & Sea Slug Profiles
- Reef Tank Janitors - Part 2
- Sea Cucumber Profiles
- Sea Urchin Profiles
- Shrimp Profiles
- Snail Profiles
- Sponge, Sea Squirt & Tunicate Profiles
- Starfish / Sea Star Profiles
- Tank Janitors
Fish and Coral Diseases
Parasites, viral, bacterial and fungal infections are but a few of the diseases which can affect the fish, invertebrate and corals in your aquarium. Early diagnosis and treatment are the keys to a quick and successful cure.
- Fish Disease Trouble Shooter
- Diagnose & Treat Fish Diseases
- Disease Diagnostic Tools
- Parasites
- Top Parasitic Medications
- Hyposalinity / OST
- What Hyposalinity Kills
- Bacterial & Other Diseases
- Top Marine Antibiotic Products
- How to Treat Ammonia Burns
- First-Aid Kit for Saltwater Aquariums
- HLLE / LLE Disease
- Lymphocystis Virus in Saltwater Aquariums
- Fish Euthanasia
- Ozone & UV Sterilizers
- QT Set Ups & Quarantining
- Coral Diseases & Health
- Why Did My Fish Die?
- Top Saltwater Aquarium Myths
Fish & Invert Nutrition

Do you know what feeding categories your fish and invertebrates fall into, or what their primary food preferences are? You should, because if you don't, how can you expect to provide the animals you choose to keep in your aquarium with the proper diet.
- 11 Primary Food Groups of Marine Fishes
- 4 Basic Feeding Categories of Fishes & Inverts
- Aggressive Food Competition Behavior of Fish
- DIY Feeder Plans & Food Recipes
- Fish Compatibility - Food Competition Behavior
- Fish Food Comparisons Chart
- How Often Should I Feed My Fish?
- How To Tips for Feeding Fish & Inverts
- Live Foods to Feed Your Fishes
- More Food, Feeding & Nutrition Info
- Popular Supplemental Liquid Vitamins
- Top Automatic Fish Feeders
- Top Foods of Choice for Fish & Inverts
- What is Nori, and How is it Used?
Selecting & Buying Livestock
Is a fish or invertebrate you want to buy healthy? Is it an animal suited to your level of aquarium keeping skills? How about compatibility issues? Before you buy any fish and invertebrates for a saltwater aquarium or reef tank, it's important to learn about these and other factors related to making good livestock choices.
- Aggressive Territorial Behavoir of Fish
- An Easy Way to Decide What Animals to Choose
- Before You Buy Livestock Tips
- Beneficial Sand Sifting Gobies
- More Tank Janitor Info
- Online Buying Livestock Tips
- Other Types of Aggressive Fish Behavior
- Venomous Fish and Invertebrate Species
- What Are Reef Tank Janitors?
- What to Look For When Buying Fish
Moving & Transporting Aquarium Animals
Before moving or transporting saltwater fishes and invertebrates, learn how to plan ahead for the move to insure the animals arrive safely and in good health.

