brittle star larva

Images made through a microscope. All subject types.

Moderators: ChrisR, Chris S., Pau, rjlittlefield

Post Reply
Wim van Egmond
Posts: 826
Joined: Tue Aug 15, 2006 9:28 am
Location: Berkel en Rodenrijs, the Netherlands
Contact:

brittle star larva

Post by Wim van Egmond »

This is the larva of a brittle star. The body is supported by thin silicious rods. These show bright colours under the polarised ligth of DIC.

Wim

Image

Ken Ramos
Posts: 7176
Joined: Thu Jul 27, 2006 2:12 pm
Location: lat=35.4005&lon=-81.9841

Post by Ken Ramos »

Gee Wim...looks like a new stealth fighter or something. Never have seen one of these before. I am assuming that a "brittle star" is a marine organism? Wonderful image and quite interesting too. :D

bernhardinho
Posts: 563
Joined: Sun Aug 13, 2006 6:28 am
Location: Germany
Contact:

Post by bernhardinho »

Yes Ken,

my good friend Mr. google just told me it's some kind of sea star. Gosh, you learn a lot here!!

Wonderful image, by the way!!

Bernhard

beetleman
Posts: 3578
Joined: Fri Aug 04, 2006 4:19 am
Location: Southern New Hampshire USA

Post by beetleman »

An excellent shot Wim. A question...when you take your samples from the ocean, how long do the creatures survive? Does it behave like a freshwater culture, where things live and then the culture evolves over time with different creatures showing up at different times?
Take Nothing but Pictures--Leave Nothing but Footprints.
Doug Breda

crocoite
Posts: 297
Joined: Wed Aug 02, 2006 3:38 am

Post by crocoite »

Excellent shot Wim.

You know, when it comes to insects, we are not surprised at the very different morphology between the larval and adult stages, but I personally rarely think of other critters in the same way. From memory, brittle stars can have many arms (not the standard 5 that most starfish have), but you can't pick any on this little one!

Wim van Egmond
Posts: 826
Joined: Tue Aug 15, 2006 9:28 am
Location: Berkel en Rodenrijs, the Netherlands
Contact:

Post by Wim van Egmond »

Thanks!

Yes, the larvae of echinoderms are amazingly different from the adults. Britle star and sea urchin larvae have these ods. Sea stars don't have them.

Unfortunately the marine organisms last only a couple of days. I keep the samples in the fridge. They need a lot of oxygen so a flat dish is best. And than work very fast! But perhaps it should be possible to keep them longer if you have a cooled aquarium with an air pump.

Wim

Wim van Egmond
Posts: 826
Joined: Tue Aug 15, 2006 9:28 am
Location: Berkel en Rodenrijs, the Netherlands
Contact:

Post by Wim van Egmond »

I'll post some other echinoderm larvae to show the difference.

Below is a juvenile brittle star. It already has the adult shape. The transformation is a strange process.

Wim

Image

Post Reply