Marine

Sharks

Like all fish, sharks are vertebrates, but ichthyologists separate them from most bony fish because a …

Sharks, Hammerhead

Sphyrna species

Hammerheads are easy to identify, even for the beginner: the eyes are located at the ends …

Sharks, Sharpnose

Rhizoprionodon species

It has a characteristic long and flattened snout and a slender brown to olive-gray body with …

Sharks, Thresher

Alopias species

Known by various names, the thresher shark is distinguished by its well-branched tail, whose upper blade …

Sharpnose sevengill shark

Heptranchias perlo

These sharks have a slender, spindly body with a narrow, pointed head. The large oval eyes …

Sheephead, California

Semicossyphus pulcher

The body is elongated, strong and compressed. This species is hermaphroditic: it begins life as a …

Sheepshead

Archosargus probatocephalus

The body is comparatively short and high. Head is high. Mouth almost horizontal, small or medium-sized, …

Shi drum

Umbrina cirrosa

Body elongated, high, slightly compressed at the sides. Muzzle short and blunt. Small mouth with fine …

Short mackerel

Rastrelliger brachysoma

The short mackerel has the typical appearance of a medium-sized mackerel. This species is characterised by …

Short-finned eel

Anguilla australis

The body is long, snake-like, tubular, the head is small, and the jaws reach from behind …

Short-finned pilot whale

Globicephala macrorhynchus

The short-finned pilot whale is very different in appearance from the long-finned pilot whale. They have …

Short-tail stingray

Bathytoshia brevicaudata

The short-tail stingray has a broad, diamond-shaped pectoral fin disc that is wider than it is …

Shorthorn sculpin

Myoxocephalus scorpius

The head is broad and spiny, the body is strong and scaleless. There are two conspicuous …

Shortjaw bonefish

Albula glossodonta

This species is characterized by the following features: the tip of the lower jaw is broadly …

Shovelnose sea catfish

Arius subrostratus

The species was first described in 1840 by Achille Valenciennes.

Shrimp scad

Alepes djedaba

The body of the shrimp scad is elongated, compressed at the sides and covered with fine …

Shulupaoluk

Lycodes jugoricus

Shulupaoluk has a naked body; scales are completely absent, even in the largest specimens. The chin …

Siberian sturgeon

Huso baerii

The Siberian sturgeon has a spindle-shaped body with several longitudinal rows of bumps. Its short, triangular …

Sicklefin lemon shark

Negaprion acutidens

A large, stocky, yellowish shark with a broad, blunt snout, narrow teeth with smooth protrusions on …

Sicklefin weasel shark

Hemigaleus microstoma

The sicklefin weasel shark has a slender body and a rounded, rather elongated snout. The large …

Silky shark

Carcharhinus falciformis

The name "Silky" was given to the shark because of its soft, placoid scales. The silky …

Silver pomfret

Pampus argenteus

Body very large, strongly compressed at the sides, with hard muscles. Caudal peduncle compressed at the …

Silvermouth trevally

Ulua aurochs

There are many very long, feather-like gill stamens that protrude into the mouth along with the …

Silversides

Leuresthes tenuis

All fish lack a lateral line and have small, almost useless teeth. The pelvic fins are …