Pristiophoridae
Japanese sawshark
Pristiophorus japonicus
FISH SPECIES
Saltwater Fish
Saltwater tells you where a fish may live, but it says little about the space it actually uses. A sheltered estuary, a shallow coral reef, the open water above a continental shelf and the deep seafloor differ in light, movement, food and shelter. NOAA describes essential fish habitat in terms of the places needed for feeding, growth and reproduction. Those functions are more useful than treating all marine records as one ecological category.
FISH ATLAS / FIELD GUIDESaltwater FishIN THIS CHAPTER01 / Characteristics02 / Lifestyle03 / Species04 / Field notes
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01 / NATURAL HISTORY
Characteristics
Pelagic means living in the water column; benthic refers to a relationship with the bottom. These are positions, not family names. A fish may forage above the bottom and rest beside it, while another crosses open water far from shore. The depth and substrate reported by an observer therefore matter more than a simple sea icon. Current, suspended food and hiding places also change across a coast or shelf.
- 01Osmoregulation in saline waters
- 02Hydrodynamic & camouflaged forms
- 03Complex marine trophic partitioning
02 / LIFESTYLE
Lifestyle
Body shape can suggest a way of moving, but it does not identify a fish or prove its ecology. A streamlined body may help sustained swimming; a compressed shape can make maneuvering around structures easier. Similar forms also appear in unrelated lineages. Compare the head, fins and tail together, and check a regional identification source before assigning a scientific name. An illustration is useful for orientation but is not independent evidence of an observation.
OBSERVATION INDEX
- Follow a life history through connected waters
- Handle salinity and conservation precisely
- Make one careful comparison from the atlas
03 / SPECIES
Representative species
Discover representative species illustrating the ecological diversity, morphologies and adaptations of this group.
Japanese sawshark
Carangidae
Japanese scad
Decapterus maruadsi
Scorpaenidae
Japanese Scorpionfish
Rhinopias argoliba
Ogcocephalidae
Japanese seabat
Dibranchus japonicus
Syngnathidae
Japanese seahorse
Hippocampus mohnikei
Squalidae
Japanese shortnose spurdog
Squalus brevirostris
Scorpaenidae
Japanese shortspined scorpionfish
Scorpaena brevispina
Gerreidae
Japanese Silver Biddy
Gerres equulus
Gerreidae
Japanese silver-biddy
Gerres japonicus
Narkidae
Japanese sleeper ray
Narke japonica
Blenniidae
Japanese snake blenny
Xiphasia matsubarai
Lutjanidae
Japanese snapper
Paracaesio caerulea
Holocentridae
Japanese soldierfish
Ostichthys japonicus
Scombridae
Japanese Spanish mackerel
Scomberomorus niphonius
Chimaeridae
Japanese spotted ratfish
Hydrolagus barbouri
Squalidae
Japanese spurdog
Squalus japonicus
Uranoscopidae
Japanese stargazer
Uranoscopus japonicus
Plotosidae
Japanese Striped Eel Catfish
Plotosus japonicus
Pomacanthidae
Japanese swallow
Genicanthus semifasciatus
Pempheridae
Japanese Sweeper
Pempheris japonica
Aulopidae
Japanese thread-sail fish
Hime japonica
Nemipteridae
Japanese threadfin bream
Nemipterus japonicus
Triakidae
Japanese topeshark
Hemitriakis japanica
Aploactinidae
Japanese Velvetfish
Paraploactis kagoshimensis
04 / FIELD NOTES
A closer look
Is this a complete species list?
No. These are available published records with images, not an exhaustive inventory or a measure of abundance.
How can I check a claim?
Follow the scientific name and source, check the scope of the evidence, and send a correction with the exact claim if needed.