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
White marlin pectoral fin and extends the length of the fish toward the caudal fin. Internally, white marlin do not have a swim bladder, but instead have small, bubble-shaped chambers that act as a swim bladder. Similarly to most vertebrates, they have symmetrical gonads. Unlike other marine fish, white marlin do not have gill rakers which are involved in suspension feeding. White marlin do have small but sharp teeth that are used when eating fish and cephalopods. White marlin are found throughout warmer waters of the Atlantic between 45°N to 45°S, it is found in the Gulf of Mexico, Caribbean Sea, and