If a live earthworm is pricked with a needle on its outer surface without damaging its gut, the fluid that comes out is:
coelomic fluid
haemolymph
slimy mucus
excretory fluid
The exterior layer of the earthworm is covered by cuticles, then follows the muscle layers. After this coelomic fluid is present, therefore when we prick the surface of the earthworm without damaging its gut, the coelomic fluid comes out.