Posts Tagged ‘Aquariums’

Clubbing fish

June 3rd, 2010

A nightclub in England recently had a revamp and decided that their resident fish were no longer required. Toko’s giant gourami (illegal in Australia) and two catfish had called the nightclub home for ten years, but will now reside at the Brighton Sea Life Centre.

After being exposed to years of pounding drum’n'bass music, there was concern that the fish may not feel comfortable in their new surroundings straight away, so the staff are making sure that they continue to receive regular drum’n'bass sessions. They’ll slowly be weaned onto their new, quieter environment.

From Practical Fishkeeping:

Fish experts believed that the gradual reduction of vibrations would help the fish to settle in and recently conducted research would suggest that fishes ‘happiness’ may be affected by the sounds they hear and are exposed to.

Practical Fishkeeping has already explored the idea that sounds are important to fish and can have an impact on their breeding and behaviour.

It’s nice to see fish that are no longer wanted finding a good home.

Mundi

February 28th, 2010

I’ve been struggling with a cold this weekend, spending time coughing, hacking, wheezing and sleeping. This afternoon I decided to play with my new camera, and filmed my barramundi. It didn’t turn out very well due to me not cleaning the glass or turning off the other aquarium lights to stop reflections. I’ll have to try again some other feeding time, and will zoom in on the strike. For now, however, here are four frames, 0.08 seconds between shots. I’m glad he doesn’t have sharp teeth.

Barramundi

Mundi strikes

Wonderpus photogenicus

January 7th, 2010

A fitting scientific name for this octopus:

Via Jerry Coyne at Why evolution is true. Check out the strawberry crab on that post too. I need more money and room for aquariums!

Mystery fish needing identification

January 1st, 2010

Unknown juvenile fish

Here’s another small fish I found in a rock pool at Taylor Point. Scouring my books hasn’t been helpful, and I suspect the adult form may be somewhat different from the juvenile form. I was initially thinking it was a rabbitfish, but I’m less confident of that now.

The fish I gave an arm and a hip for

January 1st, 2010

Indopacific sergeant (Abudefduf vaigiensis)

The 1cm long fish above is the one I was chasing when I took my Christmas Day tumble, and ended up in hospital getting X-rays of my arm. My wounded arm and hip are healing slowly, while the fish is gaining weight quickly. It seems to be enjoying captivity, and has quickly become quite tame and relaxed. This shouldn’t be too surprising as sergeants seem to be the most common fish (with six-barred wrasses second) to follow snorkellers around the reef looking for food kicked up by the snorkeller’s fins.

Caesarean by shark bite

November 12th, 2009

Sigh… I really need some bigger aquariums.

Penis-eating worms and anatomically correct cephalopods (Linkfest)

November 12th, 2009

Some light reading:

  • Sharks do get cancer – Christie Wilcox at Scientific Blogging talks about the lie about sharks not getting cancer and the multi-million dollar industry wiping out shark populations and defrauding consumers.
  • Anatomically incorrect octopuses – Also at Scientific Blogging, Danna Staff raises the question “Why do cartoon cephalopods always have their mouths in the wrong places?”
  • A giant penis-eating worm has been found at an aquarium in the United Kingdom – Staff at The Deep in Hull, UK, recently found a Eunice aphroditois (AKA the Bobbit Worm) in one of their tanks. The female of the species bites off the male’s penis and feeds it to the young… yet some human males still think we have it bad.
  • Death drops in on Mr Deity to complain about his working conditions.

Cowrie

August 30th, 2009
Cowrie snail

Cowrie snail (Cypraea arabica)

While wandering around the rocks at the northern end of Trinity Beach, I noticed a bit of a cowrie shell buried in a pool. I pulled it out expecting it to be an empty shell, but found the snail was still inside, so I brought it home.

Unfortunately some cowries aren’t safe to keep around corals or anemones, so after taking the photo I put this into my sump pending confirmation that it’s reef safe. It may end up in its own tank, or be returned to the beach.

Note: Updated following identification.

Another addition (not through fission/cloning)

August 1st, 2009
Mushroom coral skeleton

Fungia coral skeleton (Wikipedia commons)

Quite a few times in the past I have found flat disc shaped coral skeletons on the beach, and on a couple of times I have seen them alive out on the reef, looking much the same but with some flesh and colour. I had assumed that that’s what they always looked like.

Yesterday I was in at Cairns Marine wanting to buy some coral for one of my tanks, and had my eye on a particular type I had seen. They’re a mass of writhing tentacles that sits on the sand. Pictured below is the one I bought. The tips are a little greener to the eye than the camera captures.

Mushroom coral

Fungia coral

It was only when the salesperson picked up the coral and briefly turned it over that I realised that the two were the same. The live corals I have seen out on the reef have always had the tentacles withdrawn.

This is the first specific purchase of coral for me, though I do have a couple of small pieces of hard coral on some live rock that I had bought previously.

Anemone x 2

July 31st, 2009

This morning I peeked into one of my reef tanks and noticed that the resident anemone (Entacmaea quadricolor) looked a little strange, as if it was spread out more than usual with its middle under a rock. Giving it some thought, then moving the rocks to have a look, I found that this is not the case. It seems that about a quarter of the anemone has broken off to become a new anemone. In the photo below, the quarter section is in the hole on the left, and the main part of the anemone is on the right.

Bubbletip anemones

Bubbletip anemones

Asexual reproduction through fission is not uncommon in anemones. I had a close look at the main part, and it’s like a quarter pie slice has been taken out of the anemone, and those edges are being brought together to be joined. The remaining quarter, I assume, is doing a similar task, stretching itself around to make a full circle. The result of this is, of course, that my anemone has cloned itself – the anemones are genetically identical.

The larger section starting to heal

The larger section starting to heal

Radial symmetry must make reproduction by fission much easier. I would hate to undergo the process myself.