So. While we're wondering how to go about getting Demyx P. Houdini out of this very narrow space he put himself in, he managed to wiggle back through the hole into his tank.
And was staring at us as if to say, "What?"
I plugged the hole with the pump output nozzle, until I find an adequate bit of sponge.
Daughter thinks he's even cooler now.
Here's another Rupert Brooke poem about fish and fishy heaven. I think he quite liked them:
Heaven
by Rupert Brooke
FISH (fly-replete, in depth of June,
Dawdling away their wat'ry noon)
Ponder deep wisdom, dark or clear,
Each secret fishy hope or fear.
Fish say, they have their Stream and Pond;
But is there anything Beyond?
This life cannot be All, they swear,
For how unpleasant, if it were!
One may not doubt that, somehow, Good
Shall come of Water and of Mud;
And, sure, the reverent eye must see
A Purpose in Liquidity.
We darkly know, by Faith we cry,
The future is not Wholly Dry.
Mud unto mud! -- Death eddies near --
Not here the appointed End, not here!
But somewhere, beyond Space and Time.
Is wetter water, slimier slime!
And there (they trust) there swimmeth One
Who swam ere rivers were begun,
Immense, of fishy form and mind,
Squamous, omnipotent, and kind;
And under that Almighty Fin,
The littlest fish may enter in.
Oh! never fly conceals a hook,
Fish say, in the Eternal Brook,
But more than mundane weeds are there,
And mud, celestially fair;
Fat caterpillars drift around,
And Paradisal grubs are found;
Unfading moths, immortal flies,
And the worm that never dies.
And in that Heaven of all their wish,
There shall be no more land, say fish.
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He apparently feels my multi-nib pen is a major threat to bettas everywhere. Silly fish. Now he's loafing on his leaf hammock, content at having vanquished the pen of doom. 
