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.
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)
Tetronychia gigas Birstein & M. Vinogradov, 1955
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)
Philippine Trench from Philippine Sea, Mariana Trench from North Pacific Ocean and Kuril-Kamchatka Trench
| Species | Phylum | Common Name | Ecosystem | Depth | Habitat | NCBI Taxonomy ID |
|---|---|---|---|---|---|---|
| Hirondellea gigas | Arthropoda | - | Deep sea | 6,800-11,000 | Mariana Trench in the northwestern Pacific Ocean | 1518452 |
| Genome Assembly | Genome Size | Assembly level | Released year | WGS accession | Submitter | BioProject | BUSCO completeness (%) | Scaffold/Contig N50 (kb) | GC content (%) | Repeat Rate (%) | Gene Number |
|---|---|---|---|---|---|---|---|---|---|---|---|
| - | 13.92Gb | Chromosome | 2025 | CNA0142381 | - | CNP0005374 | 89.34 | 458,700/466.1 | 38.8 | 72.75 | 27,881 |
| Title | Journal | Pubmed ID |
|---|---|---|
| The amphipod genome reveals population dynamics and adaptations to hadal environment | Cell | 40054448 |
| Gene ID | Description |
|---|---|
| Hgig_23977 | REVERSE TRANSCRIPTASE DOMAIN-CONTAINING PROTEIN |
| Hgig_23978 | ENDO/EXONUCLEASE/PHOSPHATASE DOMAIN-CONTAINING PROTEIN |
| Hgig_23979 | MANNOSE-6-PHOSPHATE RECEPTOR FAMILY MEMBER |
| Hgig_23980 | HISTONE H3 |
| Hgig_23981 | HISTONE H3 |
| Hgig_23982 | HISTONE H3 |
| Hgig_23983 | - |
| Hgig_23984 | GLUTATHIONE S TRANSFERASE D10, ISOFORM A-RELATED |
| Hgig_23985 | GLUTATHIONE S TRANSFERASE D10, ISOFORM A-RELATED |
| Hgig_23986 | POLY(A) RNA POLYMERASE |
| Hgig_23987 | WD40 DOMAIN-CONTAINING PROTEIN MIO FAMILY MEMBER |
| Hgig_23988 | ADDITIONAL SEX COMBS LIKE PROTEIN ASXL |
| Hgig_23989 | SERINE HYDROXYMETHYLTRANSFERASE |
| Hgig_23990 | - |
| Hgig_23991 | DNA-DIRECTED RNA POLYMERASE SUBUNIT K |
| Hgig_23992 | MEIOTIC NUCLEAR DIVISION PROTEIN 1 HOMOLOG |
| Hgig_23993 | PDF RECEPTOR-LIKE PROTEIN-RELATED |
| Hgig_23994 | TRANSPOSABLE ELEMENT TC3 TRANSPOSASE-LIKE PROTEIN |
| Hgig_23995 | AAA-FAMILY ATPASE |
| Hgig_23996 | PROTEASOME SUBUNIT ALPHA/BETA |
