Billingsgate is certainly an experience,I went several times when I lived on the Isle of Dogs years ago.The parrot fish are general reef fish,I have seen and eaten them in Pinas,malaysia,indonesia etc,if your diving on a reef the colours are really vivid when the fish is alive,they have the small "Beak" for feeding on the hard corals I think The "swordfish" are a generic species of Gar,you get smaller ones here in the UK,odd fact about british Gar,when you cook them their bones take on a greenish tinge Caught the pinoy version freelining small fish liphooked on a treble,the visayan name for them was BaluI think theres also salmonite in one of your pics,and the crabs look like alimasag or lambay?But I have also seen a type of alimango with blue shell markings similar