Friday, March 20, 2009

Fisherman's bucket

Hermits, hermits, hermits!     Yesterday a local fisherman Mike brought us in a pile of goodies fresh off his sea urchin drag boat.  The weather had finally warmed up and the seas subsided enough for him to go out safely and try and make his living.

Besides the sea stars he brought in, I had asked him to keep an eye out for some hermit crabs and other small invertebrates.  The hermits were HUGE - mostly Flat - Clawed variety, but there were some Hairy Hermits as well.  Some of them were a bit stressed due to the anoxic conditions in the small pail and they had exited their shells. This was a bit concering, at first - I wondered how they would do outside their shells.  I placed them into my tank 'naked' for the evening and when I returned in the morning, they had all found suitable shells to move back into... 'shall I slip into something a bit more comfortable...?'.  To my surprise, many of the hermits were egg laden (gravid, berried?).  You wouldn't be able to see this unless they had come out of their shells.  The eggs look just like a lobsters egg mass.  The color was very black and the eggs a bit smaller though.

Hermit crabs are one of the easier marine inverts to take care of  in a tank.  I feed mine bits of clam or  squid when I have it.  They will all gather round a lump of feed like cows at a trough, snipping and tearing bits to feed into their mouths.  It is pretty neat to watch.  As for the  shell species that were represented - there were all the major mollusc snails we have here in Cobscook Bay.   Wave Whelk shells, Moon Snail shells, Stimpon's Colus shells, and Dogwinkle shells.  The Moon Snail shells are the most impressive.  Since these snails get very large, the Hermits that inhabit them are big too.  

As for other species that came up in the fisherman's trawl, we found tunicates, other crabs and worms.  There were several Toad Crabs - Hyas genus.  The largest of these was about 8" across.  The Sea Squirts in the pail were Sea Grapes  (Molgula), Sea Vase - Ciona, Sea Potatoes - (Boltenia), and Sea Peaches (Halocynthia).  All of these was cemented to other tunicates in clusters or they attach to mussels,, rocks, and other debris.   Final inspection of the pails contents revealed some fan worms, finger sponge, scaleworms and some tiny isopods - benthic creatures that had come up in the holdfasts of the tunicates and sponge.  I dumped the remainder in our tanks.  Hopefully they will adapt to the smaller quarters and find there niche - it's a crab eat , worm eat, snail eat world in there! - TTim