GB-Mf3-0NR 
The bixrrowing shrimp put on a fine display for us — Braving shells, 
carrying buckets of sand, and finally havirjg a row with one of the stoiKito- 
pods we put into the enclosure. Actually it wasn’t precisely a row. The 
mantis would start into the shrimp’s burrcw, and ooura rolling out again 
end -over-end . He tried to get into the burrow several tiures, with the 
sanra result on each try. Apparently the shrimp doesn't welcome visitors. 
The shrimp had changed the location of his min doorway again. He 
has two doors now, at least two feet apart. Whichever one It is not using 
is kept blocked with shells. When a burrow is in use, it is very carefully 
bricked up with shells — paved, actually. The jawfish builds his shells 
and stones into a sort of chimney, but this burrower appears ratter to lay 
them flat against the walls and top of tte tunnel. I don't know how he 
nanages to imke them stick. For the liras t part the shells are halves of 
small clams, with the concave side against the wall. The shrimp places 
them very carefully, and then Jiggles them to settle them into place, 
like a mason seating a brick. 
On at least two occasions Tom and I have seen what a^ieared to be a 
large sterk in the bay. Once we were colling raur hose at the end of the 
day when Tom spotted sonrathing fifty feet or so back of the boat ttet I 
took for a moment to be a manta, until I noted the sickle fin and the 
notched tail a long way behind. 
What kind of shark it was I have no idea. It appeared very broad 
at the teod, quite dark in color, and not less than ten feet long. It 
had been swimming almost on top of the water. We hustled with our hoses 
at once, upped anchor, smd tried to follow the fish — we had been able 
