Caudal mucous pit on some species included: Caudal mucous pit The caudal mucous pit, or caudal mucous horn, is an anatomical structure on the tail end of the foot of various land snails and slugs, terrestrial pulmonate gastropod mollusks. The function of this pit is the resorption of mucus when the gastropod is moving (see also Muratov 1999). An incorrect and yet often-used term for this structure is the "caudal gland". This area also used to be referred to by the term "caudal pore". Families of snails and slug where a caudal mucous pit exists in every species included: Families/subfamilies where is caudal
Pomacentrus moluccensis rays; the first anal spine is half the size of the second. The first ray of the pelvic fins is much elongated, and is longer than the head. The pectoral fins are rather shorter, and the caudal fin is shallowly forked with rounded lobes. The colour of this fish is a uniform yellow, and there is a small orange spot at the base of the pectoral fin (except for fish in the Philippines). "Pomacentrus moluccensis" is native to the tropical western Pacific Ocean. Its range extends from about 32°N to 32°S, and 92°E to 173°W. It is found down to