Showing posts with label polarised light. Show all posts
Showing posts with label polarised light. Show all posts

Wednesday, July 9, 2008

Amimintiks Can See Round Light & 100,000 Colours

Update: 9 July 2008.

Original post here.

I've just learned that my tasty crustacean doesn't have quite the fastest movement of any animal (some ant can snap its jaws faster) but it is the only animal known to see Circular Polarised Light.

The story (I missed it when it came out in March) is at the Wired Science blog.

If you want to know what Circular Polarised Light is, then look at a related news story by the same writer, Brandon Keim, at Wired Science, where this photo came from.

Next time I get some, I'll look 'em right in the eyes before I cook ém.

Wednesday, January 30, 2008

Amimintik - Mantis Shrimp

Greg Laden's Blog has a fascinating film about the truly amazing speed that these 'shrimps' move, which is quite unbelievable - they would have put Mohammed Ali in the shade.
It's a fascinating film. We have 'amimintiks' here in the Philippines - they're the spearing species shown in the film. They are extremely fast, and their grabbing arms are lined with needle-sharp spines - very sharp - you can't even handle one without getting pricked.
When you're snorkelling, you can hear them underwater - sharp reports from time to time - not all their efforts result in anything very much.


I featured them in a tale about Sunday afternoon reef foraging (right at the end):
and I can confirm that they are very tasty indeed - like lobsters but at 1/10the price. Here, they catch the spearers with sprung nooses set just above their sand holes. A bit of springy bamboo, a bit of string, and some fishy bait is all that is needed.



.

At some time in each month, some of them come loaded with 'coral' - eggs, that are the most tasty part. But, unlike lobsters, crabs, etc, that grow their eggs under their bellies, amimintiks grow theirs under the shell of their backs, so they have to moult to give birth.
There's a small local estuary here that no-one will dare cross, because although it is shallow enough, it is full of amimintiks, and they've been known to kill carabaos - the local domesticated water buffalo.

In the two photos above, you can see the creature in full size (about 10" long), and the truly awful structure of its grabbing claws.

But they are very tasty