[Video]: Sepioteuthis juveniles; 2 days +

um...

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It's a shame that I haven't made 500 more posts. Better get busy, son.
 

Steve O'Shea

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um... said:
Glad to see that everyone approves.
One must disregard TTF's outburst; I have since flushed her mouth with soapy water and a used loo brush!
 

Tintenfisch

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:nofeet:

Went in to feed the babies today, and two of them decided to tackle a large shrimp together... I didn't actually see whether one went for it, and another joined in, or whether they both went simultaneously, but neither was willing to give up. They were still locked onto opposite ends when I left. They didn't seem to be fighting (although one was clearly dragging the other around the tank), so perhaps cooperative feeding on large prey items (as has been suggested for Moroteuthis feeding on large fish) is a possibility?
Wouldn't have wanted to be the shrimp though... :goofysca:





 

Steve O'Shea

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.... or perhaps we're running out of food :lol:
 

Steve O'Shea

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The largest squid are now 3-4x the size of the smallest, and thankfully the egg mass from which they were hatching is exhausted (as in no more squid for ~ a week, at least until the next egg mass starts to hatch :| ). There would be at least 400 on display right now.

Mortality is basically zero (pretty much unprecedented success), but their ever-changing dietary requirements are such that a full tides (4hrs) collecting of live foodstuffs today is already exhausted (in ~ 1hr). Moreover, growth is so fast that I don't believe the mysid shrimp that we've been feeding them are any longer appropriate in either nutritional value or size, so tomorrow we're about to collect (hopefully) a squillion small, introduced fresh-water fish species (Gambusia), otherwise known as the mosquito fish, that can tolerate marine salinity, and a trillion glass shrimp to keep them going through this next rather-challenging week.

The squid went on public display a couple of days ago, and hordes of people gather to look through the viewing window; basically people like squid. Makes me feel rather good. Still haven't got around to posting pics though; I am slack; you can hit me with a rotten fish come TONMOcon!

Here's hoping there are a few more Tonmo recruits as a consequence! There's nice TONMO signage there.
 

Steve O'Shea

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They're getting a little larger now.

Pics of the tank setup (0.8m diameter, 1 m height), squillions swimming around, absolute gluttony and a few close ups (still hard to focus on the moving guys).





 

Jean

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Cute! They've grown so much, how old are they now??

How often do you (or the staff) do an algae clean on the acrylic? It looks very sparkly!

J
 

Steve O'Shea

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We haven't done an algae clean yet .... and it's been a few months for one of the tanks.

The squid are nearing 3 weeks old now (some of them); some are only 3 days old, so there's a huge discrepancy in size in the tank.

We tried glass shrimp yester as an appropriate food, and the squid lunged at them, devouring them. Unfortunately the Gambusia (freshwater fish, supposedly tolerant of salt) lasted only a few minutes, but they were also snaffled up pretty quickly.
 

Tintenfisch

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Need to see it to believe it?
Can you imagine what Mesonychoteuthis could tackle? :goofysca:





 

um...

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Tintenfisch said:
Need to see it to believe it?
Can you imagine what Mesonychoteuthis could tackle? :goofysca:

Still don't believe it. :shock:
 

Jean

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Steve O'Shea said:
We haven't done an algae clean yet .... and it's been a few months for one of the tanks.
Lucky you! We're constantly algae cleaning, especially in our biggest tank (which the architect put under a skylight :shock: :shock: :shock: )

J
 

Steve O'Shea

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We had a power outage this evening (quite a large part of Auckland central was out), with all lights/power down for at least an hour.

... so there I was, peering into the tank to detect any movement (the aquarium we are based at, Kelly Tarlton's, is actually underground ... so there was ZERO light, spare an emergency thing down the corridor) when the lights went back on.

Well, if only I'd had a camera primed for that moment. Every squid had their chromatophores banded down their body, transparent/band/transparent/band, with their arms all curled backwards and similarly banded.

Never seen anything like this before; I'll have to get some extremely low-light-level camera in there, infrared or something, and see just what these animals are doing in pitch black (even at night I have a small fluorescent tube on in their room).

When the lights went back on four larvae hatched from eggs in an adjacent tank (the first hatching larvae from new egg masses in over a week). I didn't quite realise how big these animals had grown until I placed the 4 new ones in the tank (they were dwarfed!!!!, ~ 5 times smaller).

As an aside, I had Discovery folk here last week .... It looks like we'll have a web cam on this tank very soon (and a brand new tank in ~ a month to accommodate the larger animals).
 

Steve O'Shea

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They're certainly getting easier to photograph these days (as they're getting considerably larger)!

Cannibalism is proving to be a major problem, as the stocking density in the tank is way too high. Yesterday morn 6 large squid (not small ones) were being devoured by other squid; this morning there were about 15 dismembered corpses on the bottom of the tank. Every day I remove a few individuals that are swimming around with almost all arms/tentacles severed (probably happens when two individuals go for the same food item and simply keep chomping away until one realises that it has been eating the other, in addition to the shrimp).

The tank is being flooded with food thrice daily; there doesn't appear to be a shortage of food!!! However, although the squid keep devouring the shrimp at a fantastic rate, I'm no longer certain whether the particular shrimp that we are feeding them are appropriate in size or nutritional value. Looks like night trips with light traps to collect oceanic euphausids might be required now .....

These three of the present stocking density





 

Steve O'Shea

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.... and three pics of the larger juveniles. I've lost track, but they're about 30 days old now





 

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