Photo credits

The 49 species photos and illustrations used on Catch Signal, with their creators, licences, sources and our changes.

Updated 9 Oct 2026

How we use these images

Every fish, crab, prawn and squid picture on Catch Signal comes from the Internet Archive, Wikimedia Commons or iNaturalist under a Creative Commons licence (CC BY or CC BY-SA), a CC0 public domain dedication, the Public Domain Mark or public domain status in the United States (4 US Government works). Each one was checked against its source page before use. We crop, resize and sometimes mirror them so the animal faces the same way on every guide; the changes are listed with each credit. The image files carry the same credit and licence in their embedded metadata.

15 of the 49 images are under a share-alike (CC BY-SA) licence, so our edited versions are shared under that same licence. We credit every image in full, including the CC0, public domain and US Government ones.

Species guide photos

Yellowfin bream (Acanthopagrus australis)
Photo: marsyd, CC0 1.0, via iNaturalist. Changes: cropped, background extended and resized.
Released under CC0, so no credit is required; we give one anyway.
Dusky flathead (Platycephalus fuscus)
Photo: Richard Ling, CC BY-SA 2.0, via Wikimedia Commons. Changes: cropped and resized.
Our version is shared under the same licence (CC BY-SA 2.0).
Summer whiting: sand whiting pictured (Sillago ciliata)
Photo: Greg Wallis, CC BY 4.0, via iNaturalist. Changes: cropped, background extended and resized.
Diver whiting (Sillago maculata)
Photo: Oscar Dove, CC BY 4.0, via iNaturalist. Changes: cropped and resized.
Snapper (Chrysophrys auratus)
Photo: brian gratwicke, CC BY 2.0, via Wikimedia Commons. Changes: cropped, background extended and resized.
Tailor (Pomatomus saltatrix)
Photo: Conway Hawn, CC BY 4.0, via Wikimedia Commons. Changes: cropped, background extended and resized.
Grass sweetlip (Lethrinus laticaudis)
Photo: Luke Lythgoe, CC BY 4.0, via Wikimedia Commons. Changes: cropped and resized.
Tiger squid (Sepioteuthis lessoniana)
Photo: Diego Delso, CC BY-SA 4.0, via Wikimedia Commons. Changes: cropped and resized.
Our version is shared under the same licence (CC BY-SA 4.0).
School mackerel (Scomberomorus queenslandicus)
Photo: Alan Couch, CC BY 2.0, via Wikimedia Commons. Changes: rotated, mirrored, cropped and resized.
Spotted mackerel (Scomberomorus munroi)
Illustration: Robbie N. Cada (FishBase), Public domain, via Wikimedia Commons. Changes: cropped and resized.
Marked as free of known copyright restrictions; we credit the creator anyway.
Longtail tuna (Thunnus tonggol)
Photo: The U.S. Food and Drug Administration, Public domain in the United States (US Government work), via Wikimedia Commons. Changes: catalogue label painted out, cropped, background extended and resized.
Public domain in the United States as a US Government work; we credit it in full.
Mac tuna (Euthynnus affinis)
Photo: Wibowo Djatmiko (Wie146), CC BY 3.0, via Wikimedia Commons. Changes: resized.
Mangrove jack (Lutjanus argentimaculatus)
Photo: Sonny Jimm, CC BY 4.0, via iNaturalist. Changes: mirrored, cropped, background extended and resized.
Estuary cod (Epinephelus coioides)
Photo: Bruce Deagle, CC BY 4.0, via iNaturalist. Changes: mirrored, cropped and resized.
Mud crab (Scylla serrata)
Photo: Almandine, CC BY-SA 4.0, via Wikimedia Commons. Changes: cropped and resized.
Our version is shared under the same licence (CC BY-SA 4.0).
Blue swimmer crab (Portunus armatus)
Photo: Scott W. Gavins, CC BY 4.0, via Wikimedia Commons. Changes: cropped and resized.
Banana prawns (Penaeus merguiensis)
Photo: Abu Hamas, CC BY-SA 4.0, via iNaturalist. Changes: cropped and resized.
Identified by the photographer as Penaeus merguiensis; not yet confirmed by other iNaturalist users. Our version is shared under the same licence (CC BY-SA 4.0).
Trevally: giant trevally pictured (Caranx ignobilis)
Photo: Hugues Evano (IFREMER), CC BY 4.0, via Wikimedia Commons. Changes: cropped, margins added and resized.
Javelin / grunter: barred javelin pictured (Pomadasys kaakan)
Photo: James H, CC BY 4.0, via iNaturalist. Changes: mirrored, cropped and resized.
Mulloway (Argyrosomus japonicus)
Photo: Bernard DUPONT, CC BY-SA 2.0, via Wikimedia Commons. Changes: cropped, background extended and resized.
Our version is shared under the same licence (CC BY-SA 2.0).
Cobia: juvenile cobia pictured (Rachycentron canadum)
Photo: SEFSC Pascagoula Laboratory; Collection of Brandi Noble, NOAA/NMFS/SEFSC, Public domain in the United States (US Government work), via Wikimedia Commons. Changes: cropped, background extended and resized.
Also offered under CC BY 2.0 by the NOAA Photo Library on Flickr. Public domain in the United States as a US Government work; we credit it in full.
Swallowtail dart (Trachinotus coppingeri)
Photo: Gary Dickson, CC BY 4.0, via Wikimedia Commons. Changes: cropped, background extended and resized.
Tarwhine (Rhabdosargus sarba)
Photo: Jesse Noone, CC BY-SA 4.0, via Wikimedia Commons. Changes: mirrored, cropped and resized.
Our version is shared under the same licence (CC BY-SA 4.0).
Luderick (Girella tricuspidata)
Photo: Shaun Lee, CC BY 4.0, via Wikimedia Commons. Changes: mirrored, cropped and resized.
Flounder: large-toothed flounder pictured (Pseudorhombus arsius)
Photo: Tim, CC BY 4.0, via iNaturalist. Changes: cropped and resized.
Pearl perch (Glaucosoma scapulare)
Photo: Jake B, CC0 1.0, via iNaturalist. Changes: rotated, cropped and resized.
Released under CC0, so no credit is required; we give one anyway.
Teraglin (Atractoscion atelodus)
Illustration: Julian Edmund Tenison-Woods, Public domain, via Internet Archive. Changes: rotated, cropped, background extended and resized.
From Fish and Fisheries of New South Wales (1882), plate XVII. Marked as free of known copyright restrictions; we credit the creator anyway.
Tuskfish: blackspot tuskfish pictured (Choerodon schoenleinii)
Photo: 呂一起(Lu i-chi), CC BY 4.0, via Wikimedia Commons. Changes: mirrored, cropped, background extended and resized.
Moses perch (Lutjanus russellii)
Photo: portioid, CC BY-SA 4.0, via Wikimedia Commons. Changes: mirrored, cropped and resized.
Our version is shared under the same licence (CC BY-SA 4.0).
Spanish mackerel (Scomberomorus commerson)
Photo: The U.S. Food and Drug Administration, Public domain in the United States (US Government work), via Wikimedia Commons. Changes: catalogue label painted out, cropped, background extended and resized.
Public domain in the United States as a US Government work; we credit it in full.
Mahi mahi (Coryphaena hippurus)
Photo: Hugues Evano (IFREMER), CC BY 4.0, via Wikimedia Commons. Changes: cropped, margins added and resized.
Wahoo (Acanthocybium solandri)
Photo: Bommerer, CC BY 4.0, via Wikimedia Commons. Changes: cropped and resized.
Yellowtail kingfish (Seriola lalandi)
Photo: Hugues Evano (IFREMER), CC BY 4.0, via Wikimedia Commons. Changes: cropped and resized.
Amberjack and samsonfish: greater amberjack pictured (Seriola dumerili)
Photo: SEFSC Pascagoula Laboratory; Collection of Brandi Noble, NOAA/NMFS/SEFSC, Public domain in the United States (US Government work), via Wikimedia Commons. Changes: cropped, background extended and resized.
Also offered under CC BY 2.0 by the NOAA Photo Library on Flickr. Public domain in the United States as a US Government work; we credit it in full.
Yellowfin tuna (Thunnus albacares)
Photo: Almcglashan, CC BY-SA 4.0, via Wikimedia Commons. Changes: mirrored, cropped and resized.
Our version is shared under the same licence (CC BY-SA 4.0).
Australian bonito (Sarda australis)
Illustration: Arthur Bartholomew, Public domain, via Wikimedia Commons. Changes: background extended and resized.
Marked as free of known copyright restrictions; we credit the creator anyway.
Marlin: blue marlin pictured (Makaira nigricans)
Photo: Hugues Evano (IFREMER), CC BY 4.0, via Wikimedia Commons. Changes: cropped and resized.
Spanner crab (Ranina ranina)
Photo: Jerome Huet (IFREMER), CC BY 4.0, via Wikimedia Commons. Changes: cropped, margins added and resized.

Other species

Photos of fish that appear in the rules lists and the freshwater guide.

Moreton Bay bug: flathead lobster (Thenus orientalis) pictured
Photo: Ang980, CC BY-SA 4.0, via Wikimedia Commons. Changes: rotated, cropped and resized.
Labelled Thenus orientalis on Commons; the Moreton Bay bugs caught in Queensland are Thenus australiensis and T. parindicus (same genus). Our version is shared under the same licence (CC BY-SA 4.0).
Garfish: snub-nosed garfish pictured (Arrhamphus sclerolepis)
Photo: James H, CC BY 4.0, via iNaturalist. Changes: mirrored, cropped, background extended and resized.
Sea mullet (Mugil cephalus)
Photo: Diego Delso, CC BY-SA 4.0, via Wikimedia Commons. Changes: background extended and resized.
Our version is shared under the same licence (CC BY-SA 4.0).
Coral trout (Plectropomus leopardus)
Photo: portioid, CC BY-SA 4.0, via Wikimedia Commons. Changes: cropped and resized.
Our version is shared under the same licence (CC BY-SA 4.0).
Red emperor (Lutjanus sebae)
Photo: Diego Delso, CC BY-SA 4.0, via Wikimedia Commons. Changes: cropped and resized.
Our version is shared under the same licence (CC BY-SA 4.0).
Spangled emperor (Lethrinus nebulosus)
Photo: Hugues Evano (IFREMER), CC BY 4.0, via Wikimedia Commons. Changes: cropped, margins added and resized.
Giant queenfish (Scomberoides commersonnianus)
Photo: portioid, CC BY-SA 4.0, via Wikimedia Commons. Changes: cropped and resized.
Our version is shared under the same licence (CC BY-SA 4.0).
Barramundi (Lates calcarifer)
Photo: Lord Mountbatten, CC BY-SA 3.0, via Wikimedia Commons. Changes: cropped and resized.
Our version is shared under the same licence (CC BY-SA 3.0).
Australian bass (Percalates novemaculeata)
Photo: Hayley P, CC BY 4.0, via iNaturalist. Changes: margins added and resized.
Golden perch (Macquaria ambigua)
Photo: Codman, CC BY-SA 3.0, via Wikimedia Commons. Changes: mirrored, cropped and resized.
Our version is shared under the same licence (CC BY-SA 3.0).
Southern saratoga (Scleropages leichardti)
Photo: Viktor Kravtchenko, CC BY 3.0, via Wikimedia Commons. Changes: cropped and resized.