Lesser Sawcrest

Lythrodontoserra longidigitalis is a species of Trachine Katanichthyeoid amphibian from the Southern shores of the Kimbawans continent up to the southeastern Yanese coast.   The animal lives in large colonies nesting in hive-type sites they build using the mucous usually reserved to make the egg sacs in other pressure swimmers as a cementing paste, reinforcing the structure with small rocks, armour pieces of plants and animals and logs.   These hives have many openings along their structure to allow the animals to easily come in and out of the rounded structure to feed or bring in food for the rest of the colony or as a reserve.   The creature feeds on a variety of other animals and plants, using the two long and sharp incisors to cut through the hard shell of Iron-mussels and Sealers and the deeply rooted teeth to grab and thrash smaller amphibians with ease.   The segmentation of the Fronto-Temporal plate brought about by many millions of years of selection gave birth to the Osteomusical plate, unique to the Trachinae subfamily in this shape and usage.   L. longiditalis uses the round plate to create rhythmic sounds to communicate with conspecifics or during mating rituals.   As every single specimen has a unique rhythm, they can easily tell who's clacking the plate by it.   Inside the nest, during the evening or other occasions in which most of the colony will be united, the species will partake in so-called "Orchestras", when most of the colony will clack the Osteomusical plate, taking turns to avoid overlapping the sounds; it is thought they do this daily to check what members of the colony are present and which are missing.   A typical colony will divide roles between members which will occasionally switch to cover all the needed work to operate and maintain it:

• Workers- in charge of hive maintenance and growth, often seen wandering around the nest reinforcing the structure, these are almost always parthenogenetic individuals
 
• Nannies- in charge of feeding and caring for the eggs and hatchlings up until they're mature enough as to join the parties outside, usually composed of sexually sterile elderly specimens
 
• Hunters- in charge of foraging for food outside the nest, they'll usually move in small packs accompanied by the shields, composed of young mature individuals
 
• Shields- in charge of protecting the Hunters from predators with their life, composed of older parthenogenetic individuals

  If the animal is disturbed it will oftentimes react aggressively by charging at the aggressor and using the sharp Osteomusical plate to open deep cuts in the potential predator; this aggressive behaviour is sometimes seen group-wide, with workers and shields often charging together when some other animal comes too close to the nest.   The internal social structure in the species has no true leadership, each animal having pre-determined roles and switching them up dynamically with other members covering up for them.   Although quite rare, in several occasions attacks have been registered on divers who went too close to the nest, sometimes resulting in fatalities due to heavy bleeding and repeated traumas.   In curated diving areas the species is exterminated on sight to avoid it nesting and making the tourist spot unusable.