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
Crazy fish of the fins can turn paler (to either orange or white), accompanied by the appearance of numerous reddish spots on the lower half of the body. The upper half of the caudal fin also turns white. Crazy fish are caught and sold for the aquarium trade. They are also edible and are sometimes fished for human consumption. They are reasonably abundant and are classified as Least Concern by the IUCN. Crazy fish Butis butis, the crazy fish, duckbill sleeper, or upside-down sleeper, is a species of sleeper goby that are native to brackish and freshwater coastal habitats of the Indian