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
Grenadiers (fish) as the giant grenadier and "Coryphaenoides rupestris". The subfamily as a whole may represent up to 15% of the deep-sea fish population. Typified by large heads with large mouths and eyes, grenadiers have slender bodies that taper greatly to very thin caudal peduncles or tails (excluding one species with no tail fin): this rat-like tail explains the common name 'rattail' and both the subfamily name and family name are derived from the Greek "makros" meaning "great" and "oura" meaning "tail". The first dorsal fin is small, high, and pointed (and may be spinous); the second dorsal fin runs along the