Something lurking in the Swamp

Appearance: Worm-Like, 45ft Long, 4ft Girth, Elongated Cylindrical Body, Dark Olive-Green, Muddy Green Flanks, Pale Green Underside, Slimy Skin, Glossy Wet Texture, Segmented Musculature, No Limbs, No Visible Teeth, Circular Expandable Mouth, Thick Fleshy Gums, Retractable Pharyngeal Jaws, Muscular Retractable Tongue, Sensory Pores, Reduced Eyesight, Heavy Body Habitat and Biology: Swamp Dweller, Semi-Aquatic, Amphibious Respiration, Mud Burrowing, Submerged Movement, Water Displacement Detection, Vibration Sensitivity, Moisture Dependent, Algae Resistant Skin, Mucus Secretion, Powerful Circular Muscles, Powerful Longitudinal Muscles Predatory Behavior: Ambush Predator, Solitary Hunter, Submerged Stalking, Mud Concealment, Vegetation Camouflage, Patient Hunting, Sudden Lunges, Underwater Ambushes, Body Wrapping, Muscular Constriction, Full-Body Restraint, Prey Dragging, Territorial Aggression, Opportunistic Feeding Consumption: Phase One: Capture, Prey Immobilization, Muscular Constriction, Body Wrapping, Escape Prevention Phase Two: Ingestion, Mouth Expansion, Tongue Extension, Muscular Tongue Movement, Lubricating Saliva, Prey Gripping Phase Three: Swallowing, Tongue Retraction, Pharyngeal Jaw Activation, Internal Gripping, Sequential Ingestion, Throat Expansion Phase Four: Internal Passage, Esophageal Expansion, Peristaltic Movement, Sequential Muscle Contractions, Stomach Entry PHASE FIVE: Energy Extraction, Biological Energy Absorption, Internal Energy Drain, Specialized Absorptive Membranes, Active Stomach Walls, Muscular Wall Contractions, Internal Compression, Prey Restraint, Opposing Muscular Pressure, Prey Immobilization Attempts, Persistent Prey Resistance, Gastric Energy Processing, Gradual Energy Depletion, Prolonged Extraction PHASE SIX: Energy Storage, Internal Energy Conversion, Temporary Energy Reserves, Reduced Activity, Digestive Chamber Relaxation, Muscular Recovery, Extended Resting Behavior, Enlarged Midsection PHASE SEVEN: Prey Expulsion, Reverse Peristalsis, Esophageal Contractions, Stomach Compression, Regurgitation, Muscular Retraction, Expulsion of Depleted Prey, Physical Preservation, Prey Survival, Severe Exhaustion, Temporary Weakness, Feeding Cycle Completion ENERGY EXTRACTION SYSTEM: Expandable Internal Chamber, Specialized Absorptive Membranes, Energy-Draining Tissue, Active Muscular Stomach Walls, Independent Wall Contractions, Opposing Internal Pressure, Muscular Compression, Prey Restraint, Internal Movement, Energy Extraction, Biological Energy Absorption, Internal Energy Conversion, Energy Storage Organs, Protective Mucus Lining, Prolonged Extraction, Reverse Peristalsis, Muscular Expulsion STOMACH INTERIOR: Warm Internal Environment, Wet Fleshy Walls, Smooth Mucous Membrane, Thick Gelatinous Mucus, Soft Elastic Tissue, Highly Flexible Walls, Moist Glossy Surface, Muscular Internal Folds, Ridged Tissue, Pulsating Musculature, Spongy Absorptive Membranes, Thick Protective Lining, Dark Green Interior, Pale Green Tissue Folds NON-LETHAL ENERGY EXTRACTION: Life-Preserving Feeding, Biological Energy Drain, Physical Tissue Preservation, Non-Digestive Feeding, Living Prey Expulsion, Energy Depletion, Temporary Incapacitation, Gradual Recovery Energy Source: Biological Vitality, Metabolic Energy, Physical Stamina, Cellular Energy Digestive Restrictions: No Flesh Digestion, No Tissue Consumption, No Bone Digestion, No Physical Assimilation Extraction Limits: Finite Energy Capacity, Variable Extraction Duration, Hunger-Dependent Feeding, Energy Storage Limit, Prolonged Recovery After Large Meals Prey Condition: Remains Physically Intact, Remains Alive, Severe Exhaustion, Possible Unconsciousness, Temporary Physical Weakness, Natural Energy Recovery PREY CHOICES: Wild Boars, Deer, Wild Pigs, Capybaras, Water Buffalo, Large Rodents, Otters, Beavers, Large Fish, Catfish, Alligator Gar, Freshwater Turtles, Large Amphibians, Water Snakes, Aquatic Mammals, Unsuspecting Humans, Fishermen, Hikers, Hunters, Campers, Boaters, Wildlife Researchers, Swamp Explorers, Lost Travellers ENERGY EXTRACTION DURATION: Small Prey: 15-45 Minutes, Medium Prey: 1-2 Hours, Large Prey: 2-4 Hours, Adult Human: 2-3 Hours, Very Large Prey: 4-6 Hours, Variable Extraction Speed, Hunger-Dependent Extraction, Energy Capacity Limit, Humans count as very large prey HUMAN PERSPECTIVE: Disorientation, Confined Environment, Extreme Humidity, Warm Surroundings, Slippery Surfaces, Restricted Movement, Muscular Pressure, Rhythmic Contractions, Low Gurgling Sounds, Sensory Overload, Fatigue, Energy Depletion, Possible Unconsciousness, Severe Exhaustion PREY DETECTION: Ground Vibration Detection, Water Displacement Detection, Movement Recognition, Submerged Investigation, Sensory Pore Activation, Prey Identification, Ambush Response, Opportunistic Hunting