Not seeing a whole lot of movement in the tank. That's been true for the last few days. I fed them again. Yesterday I gave them 2 cubes of the baby brine shrimp and then added in one of the bigger cubes of just plain ol' brine shrimp. Today I put in another big cube. Feed them! That's the ticket!
The main clump of them is in the end near the air stone. I don't know if that's the result of currents in the tank or what but that's where they are. A few are down near the filter so I made sure to get some of the brine shrimp to them as well. It's a pretty long trek for them down to the big clump.
Broad Acres ES tries again with the Maryland Horseshoe Crabs in the Classroom program. The second time's the charm!
Introducing: Horseshoe Crabs in the Classroom, Take 2
Last year, we ended up with no live horseshoe crabs (HSC) and I think this was because of over-zealousness on my part for ridding the aquarium of an unwanted fungus or at least what I thought was fungus. The 4th graders, though, were very enthusiastic and they learned a lot about the critters even though they never saw a live one in their classroom. Sigh.
This year, though, now that the teacher (me) is a bit more experienced, I think we'll have better luck. So here's Take 2...
Friday, August 10, 2012
Tuesday, August 7, 2012
August 6 - So how big are the baby horseshoe crabs? And other questions.
How many do you think would fit on a penny? 12? That's my estimate. Or guess. Anyway, you now see the famous pyrex bowl I've been using to take photos. On the equally famous red table with the white kitchen garbage bag that the aquarium sits on. This is a molt - an empty shell - so the horseshoe crab that came out of it is about 25% bigger than the molt.
Now on to my latest concern. I'm seeing lots of molts in the tank but not a lot of movement. That's probably okay. The videos below are of the accumulation of molts in the tank where some little crabs are moving around. For the second one, I used a tablespoon to gently - sooo gently - scoop out some of the molts/crabs into the bowl. You can see one moving around.
And last are two photos. The first is of some of molts that were floating on top of the water - so none of them are alive.
And then there's the one below. I could only see one of them moving. So - do you see much difference? Are some of them in the photo below alive but not moving? Stay tuned, horseshoe crab fans.
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