|Skeleton of the Venus Flower Basket, Euplectella sp.|
Here is a description of Euplectella sp. by Sir Charles Wyville-Thomson, chief scientist of the Challenger Expedition, 1873-76.
This other vase-shaped animal, half glass & half sponge is not unknown in England, but has never before been obtained elsewhere, than off the Phillipine Islands. From their great beauty and rarity they were, on their first appearance, sold in England for £50 apiece, as chimney ornaments.
The intricate structure of a glass sponge, made of fused Siliceous spicules. I found a web page for amateur microscopists about Searching for Spicules.
Spongicola venustus is a shrimp with a symbiotic relationship with Euplectella spp.
The Love StoryIn the following web page is explained that the shrimp's reproductive strategy is rational withing the sparse ecosystem of the deep sea: http://schmidtocean.org/cruise-log-post/a-deep-sea-love-story/
The Shrimp: Spongicola venustusSaito and Komai had this to say of the group of shrimps to which this species belongs:
The symbiont spongicolid shrimps are generally characterized by a reduced armature of the body and appendages and by a rather depressed body form, representing a typical pattern of adaptation to a life in a confined space within the host animal (Bruce 1976). Furthermore, some of them show a trend toward reduction of the gills and exopods on maxillipeds
The drawing as well as the description are from
Saito, T. and Komai, T., 2008. A review of species of the genera Spongicola de Haan, 1844 and Paraspongicola de Saint Laurent & Cleva, 1981 (Crustacea, Decapoda, Stenopodidea, Spongicolidae). ZOOSYSTEMA-PARIS-, 30(1), p.87.
A remarkable series of images of the shrimp and the host sponge is found, in Korean, at the following site: http://sima-niger.net/kairodoketsu-133 .
The following image is taken from this site.
And here's the lid: