Dwarf Parrot Wrasse (Cirrhilabrus rubriventralis) Family: Labridae
If I was asked to name one group of fish which featured a wealth of attributes such as beautiful coloration, tireless activity from dawn to dusk, ease of feeding, a generally peaceful nature, compatibility with invertebrates and disease resistance, I would lay odds that the questioner would not be expecting a realistic reply.

Harlequin Tusk Fish (Choerodon fasciatus) The harlequin tusk (Choerodon fasciatus) belongs to the family of wrasses. It has orange mottled bands. Each band is etched by delicate blue-violet ribbons. Anteriorly, between the orange bands is silvery-white, turning to dark grey-black posteriorly. With big protruding tiger-like fangs, the tusk looks very menacing indeed, capable of doing harm to other tank mates.


Clown Tang | Acanthurus lineatusThe Clown Tang (Acanthurus lineatus) is one of the most striking members of the Tangs / Surgeons family (Acanthuridae), being one of the most aggressive and can be challenging to keep and care for. It is also known in the trade as the Lined Surgeon and Pyjama Tang.

Sooner or later as a reef tank hobbyist you're going to want one of these beauties. They are reef safe and live harmoniously with corals and invertebrates.

Marine Fish - Tangs & Surgeonfish

Clown Trigger Fish

One type of marine aquarium never fails to create a stir, the fish-only tank containing BIG fish! The sight of large slices of brightly coloured piscine flesh cruising around an equally spacious aquarium is enough to make anyone's heart beat a little quicker. Such displays are normally the province of the public aquarium, but within the confines of a domestic setting the whole thing can be replicated on a somewhat smaller scale with equally stunning results.

General Saltwater - Big Fish & Aquariums

Blood Shrimps (Lysmata debelius) Most of my regular readers will already be aware that, on the whole, I do not condone small marine tanks; that is, tanks with a nett volume of less than 20 gallons (91 litres). They are usually very unstable as far as water parameters are concerned and subsequently exert considerable stress on fish and/or invertebrates. They are also extremely restricting for livestock and consequently prone to overstocking, especially where fish are involved.

Having said that, there is a way that the marine enthusiast can set-up a 'micro' marine aquarium housing only shrimps! Over recent years, I have been experimenting with 3-5 gallon marine aquaria containing various species of tropical and temperate shrimp and crabs. I am pleased to report that all tanks were successful and no livestock was lost.

Marine Invertebrates - Shrimps

Cyphotilapia frontosa A pair of Cyphotilapia frontosa from the authors aquarium.

One of the most beautiful and distinctive Cichlids of Lake Tanganyika has to be C. frontosa. There are two colour morphs of this species, a Berundi morph, which has six vertical bars and a Tanzanian morph, which has seven or even eight bars when they are young, although in my experience I have only ever encountered the Berundi morph. The males develop a huge lump of fat on the top of its head making this a very distinctive occupant to any aquarium.

Freshwater Fish - Cichlids

Random Aquarium Topics

FAQsReplacing Evaporated Water
Nick Dakin
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Q) Why does my marine aquarium appear to 'lose' water? Is it likely to be harmful to the fish and invertebrates? How can I replace it safely?

A) Any body of water left open to the atmosphere will evaporate if not replaced. This can be demonstrated by wetting the back of your hand. Within a minute or so, it will be completely dry as the water quickly evaporates. The same principle applies to the aquarium; given long enough, a full aquarium would dry out completely! Realistically, the marinist would attend to any lost water as required by various methods, as we shall see. It is important to note at this point that it is only water molec [ ... ]

GeneralHow to Select Compatible Freshwater Fish for Aquariums
Peter Hartono
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For peace and harmony to prevail inside your aquarium tank, make sure you put in fish species that are compatible. Like other animals, some species of fish are more aggressive and predatory, while some possess a naturally calm temperament. If you are in the process of selecting compatible fish species for your community tank, here are some tips to help you: Know the Basic Categories of Tropical fish The basis of these categories is their ability to get along well with other fish in the tank.

Water QualityCloudy Aquarium Water: Causes and Solutions
Peter Hartono
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Having cloudy water aquarium has surely been experienced by hobbyists at one time or another. This phenomenon can take place in both an established or a new aquarium.

The earliest sign that there is something wrong in your tank can be detected by looking at the water. In a well-balanced aquatic ecosystem, the water should be clear. If the water appears to be cloudy, this should tell you that something is not working as it should be.

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