- Head long and slim, presence of a small triangular crest atop the head.
- Dentition composed by a set of tightly packed long thin teeth, Sphaera Lania very large.
- Presence of one row of bioluminescent spots on the maxillae, emitting green light.
- Body long and slender, dorsal I & II fins subtriangular in shape.
- Dorsal I vestigial and rounded, Dorsal II much large, ending in a pointed shape.
- Pectoral fins long and forward-pointed, able to detatch to the seafloor and be used for predation.
- Anal I & II articulated and used in locomotion.
- Gill Tail moderately short ending in a very pointed-looking Gill Fan.
- Gill Fan reduced and short, caudal drop moderate.
Genetics and Reproduction
Mostly unknown as of now. The animal seems to enter heat in the summer. Although the parapenile extensions of males grow up to four times the length of the body, it seems like they mount the female by climbing onto her, possibly keeping the long parapenis as a trait given by their ancestry instead of serving a more functional role in the present. The females lay two to four eggs in small crevasses and will abandon the nest shortly after.
Growth Rate & Stages
Ontogenesis very apparent. The hatchlings are born with fused membrum bones, being nektonic at birth. All three pairs of walking fins have larger membranes and are used for active swimming the first part of their lives. They'll segment the membrum bone once they start feeding on the benthic invertebrates and finally assume a benthonic lifestyle upon adulthood. Loss of natal aculeus at an unknown age.
Ecology and Habitats
Hadalpelagic species found at depths superior to 6000 m. They live along the rocky slopes of the trench but most commonly around hydrothermal vents, where prey is most abundant. Although unable to swim, these animals can climb the walls of the trench to reach different depths.
Dietary Needs and Habits
Predatorial animals that hunt small amphibians and invertebrates from the benthic and demersal zones of the Cold King's Trench. It predates by ambush, leading prey into its mouth by using a row of green lights reminescent of small prey.
Thought to be periannial but due to how difficult it is to reach their environments, it's difficult to assess.
Animal that lives in very restricted groups of three to four specimens. They don't seem to posses any type of complex intraspecific communication outside of small clicks of the mouth, leading researchers to think they could be staying close for protection instead of social needs.
Not kept in any human-made structures. Specimens recovered in hyperbaric tanks died a few days after extraction for cause unknown.
Geographic Origin and Distribution
Benthic environments of the Cold King's Trench, Tropical belt
Perception and Sensory Capabilities
The Animal's blind, uses electroreception and smell to orient itself.
- Scientific Name
- Eoichthyia; Tartarosomnia; Scutophalidae; Calvatopinnoidea; Caligobeloidea; Morsvectoridae ; Podovectorinae; Araneomessor; A. horribilis
- Oldest recorded specimen: 34 Years
- Conservation Status
- Data deficient: Not enough information on the species population is known to assess its status Population Trend: UNKNOWN
- Average Weight
- 20-100 kg
- Body Tint, Colouring and Marking
- Ultra-black body with ruddy coloured fins. One single row of green bioluminescent spots runs down the maxillae.