About Hirondellea gigas

Hirondellea gigas is a species of amphipod crustacean found in the hadal zone of the Pacific Ocean, particularly in the Mariana Trench. It is adapted to extreme deep-sea environments, living at depths exceeding 10,000 meters where pressures are immense and temperatures are near freezing. This species feeds on organic matter that sinks to the ocean floor, playing a crucial role in the deep-sea ecosystem as a scavenger. Its unique adaptations, such as a lightweight exoskeleton and specialized enzymes, allow it to survive and thrive in one of the most extreme habitats on Earth.

Classification

Animalia (Kingdom); Arthropoda (Phylum); Crustacea (Subphylum); Multicrustacea (Superclass); Malacostraca (Class); Eumalacostraca (Subclass); Peracarida (Superorder); Amphipoda (Order); Amphilochidea (Suborder); Lysianassida (Infraorder); Lysianassidira (Parvorder); Lysianassoidea (Superfamily); Hirondelleidae (Family); Hirondellea (Genus); Hirondellea gigas (Species)

Original Name

Tetronychia gigas Birstein & M. Vinogradov, 1955

Key Reference Paper

1. Birstein J A, Vinogradov M E. Pelagicheskie gammaridy (Amphipoda, Gammaridea) Kurilo-Kamchatskoi Vpadiny[J]. Akademiya Nauk SSSR, Trudy Instituta Okeanologii, 1955, 12: 219-257. (Birstein et al., 1955)

Distribution

Philippine Trench from Philippine Sea, Mariana Trench from North Pacific Ocean and Kuril-Kamchatka Trench


Basic Information
SpeciesPhylumCommon NameEcosystemDepthHabitatNCBI Taxonomy ID
Hirondellea gigasArthropoda-Deep sea6,800-11,000Mariana Trench in the northwestern Pacific Ocean1518452

Genome Assembly Information
Genome AssemblyGenome SizeAssembly levelReleased yearWGS accessionSubmitterBioProjectBUSCO completeness (%)Scaffold/Contig N50 (kb)GC content (%)Repeat Rate (%)Gene Number
-13.92GbChromosome2025CNA0142381-CNP000537489.34 458,700/466.138.872.7527,881

References
TitleJournalPubmed ID
The amphipod genome reveals population dynamics and adaptations to hadal environmentCell40054448

Gene Information

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Gene IDDescription
Hgig_21877HOMOLOGOUS TO DROSOPHILA SQD (SQUID) PROTEIN
Hgig_21878GALACTOSIDE 2-L-FUCOSYLTRANSFERASE
Hgig_21879GNAT FAMILY N-ACETYLTRANSFERASE
Hgig_21880GUANINE NUCLEOTIDE EXCHANGE FACTOR
Hgig_21881PKSB
Hgig_21882PROTEASE S51 ALPHA-ASPARTYL DIPEPTIDASE
Hgig_21883-
Hgig_21884ANGIOTENSIN-CONVERTING ENZYME
Hgig_21885FATTY-ACID AMIDE HYDROLASE
Hgig_21886-
Hgig_21887-
Hgig_21888U2 SNRNP AUXILIARY FACTOR, SMALL SUBUNIT
Hgig_21889MEDIATOR OF RNA POLYMERASE II TRANSCRIPTION SUBUNIT 24
Hgig_21890MEDIATOR OF RNA POLYMERASE II TRANSCRIPTION SUBUNIT 24
Hgig_21891ARYLSULFATASE
Hgig_21892-
Hgig_21893-
Hgig_21894ARYLSULFATASE
Hgig_21895-
Hgig_21896GLUCOSE-METHANOL-CHOLINE GMC OXIDOREDUCTASE
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