That Fish Blog – Aquarium Advice and Information

Hello, Frank Indiviglio here.  Aquarists have long known that Discus Fish (Symphysodon spp.) produce mucus with which to feed their young.  However, recent studies revealed unexpected new parenting behaviors, leading some ichthyologists to compare them to mammals.  Just as surprising is the discovery that the European Eelpout (Zoarces viviparus), a commercially valuable marine fish, actually suckles it young with a milk-like secretion!

Weaning Behavior

The surprising new information about Discus appeared in the October 29, 2010 issue of the Journal of Experimental Biology.  While observing a breeding colony of the much-admired South American fishes, University of Plymouth (UK) biologists noticed that both parents avidly fed the young with mucus secretions for 2 weeks.  The fry were allowed to feed from an adult’s body for approximately 10 minutes, after which the ravenous little fellows were “flicked” onto the mate for more food.  Read More »

Many stories have come to light through recent years discussing the plight of coral reefs around the world; overfishing, destructive collecting methods, pollution, and ship traffic damage have taken a serious toll.  A number of new studies show that an even greater threat has emerged in 2010, extreme water temperatures.

Earlier this year, the region of Indo-pacific reefs known as the Coral Triangle (a roughly triangular area that encompasses Indonesia, Malaysia, Papua New Guinea, the Philippines, Solomon Islands and Timor-Leste) endured record surface water temperatures. These extreme water temperatures caused a mass coral bleaching event that may prove to be the worst on record. Read More »

Hello, Frank Indiviglio here.  Many of the 2,700 scientists involved in the Global Census of Marine Life are meeting this month (October 7-10, 2010) in London to discuss the information they have gathered over the past 10 years.  In what is surely one of the largest scientific collaborations ever undertaken, researchers studied creatures ranging from microorganisms to whales in habitats stretching from pole to pole and shoreline to ocean abyss. 

Grand Ecosystems and Grand Studies

It is impossible to overstate the importance of the world’s marine habitats and the billions of organisms that make their homes in them – from providing one half the world’s oxygen and much of humanity’s food to influencing climate the world over, their influence cannot be escaped.  Read More »

Nearly a month ago, I was able to represent That Fish Place for MACNA in Orlando, Florida. MACNA (Marine Aquarium Conference of North America), is one of the oldest and largest marine aquarium conferences in North America. Each year you will find new/advanced technology in the hobby, new companies, and of course, livestock. This year was all about LED technology, which seems to be the future of lighting in the hobby.

Amongst the chatter of LEDs was the talk of Papua New Guinea and the SEASMART program. Last year in Atlantic City, SEASMART attended MACNA in the attempt to raise awareness for the need to collect livestock sustainably with an all new approach. Dan Navin, a close friend of mine collected some information on the program while we were there. He made a side trip to Papua New Guinea while vacationing in Australia to check out the operation, a few weeks later. Needless to say he liked what he saw, and is now the SEASMART MAR (Mariculture, Aquaculture, Restoration) Division Manager. Read More »

Almost every aquarist will feel the sting from a cnidarian (anemones, jellyfish, ect.) at some point or another. For some, it can just be a mild annoyance, but for others it can be downright painful or even dangerous. The correct treatment depends on what you were stung by and how sensitive you are to it.

Cnidaria is a large phylum (one of the broadest scientific classifications) and includes jellyfish, corals, anemones, and hydroids that aquarist might encounter in their tanks. Cnidarians have specialized stinging cells known as “nematocysts” or “cnidocysts”. These cells can be used as defense mechanisms or to catch prey. Some are harmless to people, but effective on the cnidarian’s targeted prey.  Some can be lethal to anything they touch – the Sea Wasp, a type of box jellyfish, is touted as the most venomous marine animal ever and is usually fatal. Different types of nematocysts have different functions and one animal can have more than one type of nematocyst at a time, but all function essentially the same way. Read More »