Tuesday, 8 January 2019

WASH ON, WASH OFF

If you were a fish living in the warm turquoise waters off the coast of Bonaire, you may not hear those words, but you'd see the shrimp sign language equivalent. It seems Periclimenes yucatanicus or Spotted Cleaner Shrimp is doing a booming business in the local reefs by setting up a fish washing service.

That's right, a Fish Wash. You'd be hard pressed to find a terrestrial Molly Maid with two opposable thumbs as studious and hardworking as this wee marine beauty.

This quiet marine mogul is turning out to be one of the ocean's top entrepreneurs. Keeping its host and diet clean and green, the spotted shrimp hooks up with the locals, in this case, local sea anemones and sets up a fish wash. Picture a car wash but without the noise and teenage boys. The signage posted is the shrimps' natural coloring which attracts fish from around the reefs.

Wash on, wash off.

Once within reach, the shrimp cleans the surface of the fish, giving the fish a buff and the shrimp its daily feed.

Monday, 7 January 2019

FRATERCULA ARCTICA

This lovely fellow is a Puffin or "Sea Parrot" from Skomer Island near Pembrokshire in Wales. 

They live about 20 years making a living in our cold seas dining on herring, hake and sand eels.

They are good little swimmers as you might expect but surprisingly they are great flyers, too! Once they get some speed on board, they can fly up to 88 km an hour. 

The sexy orange beak (dead sexy, right?) shifts from a dull grey to bright orange when it is time to attract a mate. 

While not strictly monogamous, most Puffins will choose the same mate year upon year producing adorable chicks or pufflings (awe) from their mating efforts.

Sunday, 6 January 2019

ICHTHYOSAURIA

Ichthyosaurus was an extinct marine reptile first described from fossil fragments found in 1699 in Wales. Shortly thereafter, fossil vertebrae were published in 1708 from the Lower Jurassic.

Saturday, 5 January 2019

HOLCOPHYLLOCERAS MEDITERRANEUM

This lovely ammonite is Holcophylloceras mediterraneum (Neumayr 1871) from Late Jurassic (Oxfordian) deposits near Sokoja, Madagasgar.

Amazing suturing on this lovely ammonite and great detail, allowing us to see how he grew, adding to his size, chamber by chamber, building out his spiral shape.

Ammonite shells had many chambers divided by walls called septa. Nautiloids had simple septa with a single arc whereas ammonites developed septa with intricate folds, lobes and saddles. They also developed delicate feather-like or fern-like lacey patterns, called sutures, on the outer shell. You sometimes see them on polished or water worn specimens and in the photos of this fellow below.

The chambers were connected by a tube called a siphuncle which allowed for the control of buoyancy with the hollow inner chambers of the shell acting as air tanks to help them float. A bit like internal water wings you might use to learn how to swim as a kid.

We can see the edges of this specimen's shell where it would have continued out to the last chamber, the body-chamber, where the ammonite lived. Picture a squid or octopus, now add a shell. That's him!