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BIOL2204 Week 7
BIOL2204 Sharks + Rays
| Question | Answer |
|---|---|
| Shark and ray classification | Phylum Chordata Class Chondrichthytes (cartilagenous fishes) Subclass Elasmobranchii |
| Shark superorder | Selachii |
| Ray superorder | Batoidea |
| Key characteristics | - cartilagenous skeleton - 5-7 gill slits - dermal denticles (placoid scales) - no swim bladders (large oil-rich liver) - ampullae of Lorenzini |
| white-tipped dorsal and caudal fins, slender body | White-tipped reef shark (F. Carcharhinidae) |
| distinct white/silver tips on all fins | Silvertip shark (F. Carcharhinidae) |
| prominent vertical stripes, distinct counter shading with white ventral side, large blunt head | Tiger shakr (F. Galeocerdonidae) |
| torpedo-shaped body + conical snout, 2 distinct colours, black eyes | Great white shark (F. Lamnidae) |
| very tall, sickle-shaped first dorsal fin, strongly serrated teeth, broad, nearly straight cephalofoil with a distinct central notch | Great hammerhead (F. Sphyrnidae) |
| front edge of cephalofoil scalloped with 3-4 indents, central indentation is the deepest, high first dorsal | Scalloped hammerhead (F. Sphyrnidae) |
| broadly arched cephalofoil, no central notch or scalloping, moderate first dorsal fin | Smooth hammerhead (F. Sphyrnidae) |
| small benthic "walking shark", large black ocellus behind the pectoral fin | Epaulette shark (F. Hemiscyllidae) |
| big and massive and majestic covered in spots | Whale shark (F. Rhincodontidae) |
| distinct bands, camouflaged ambush predator with dermal lobes around mouth | Banded wobbegong (F. Orectolobidae) |
| distinct triangle between eyes, large dark saddles along back, very spotty, 6-10 dermal lobes either side of mouth | Spotted wobbegong (F. Orectolobidae) |
| dark "mask" through eyes, fewer spots only on wings, black and white bars on end of tail | Bluespotted maskray (F. Dasyatidae) |
| shorter, thicker tail with a pair of blue stripes, regular blue spots covering body, rounded body | Bluespot stingray (fantail/ribbon ray) (F. Dasyatidae) |
| very large, terminal mouth, inside of cephalic fins is white | Reef manta ray (F. Mobulidae) |
| rounded disc body, smooth looking skin, blunt and slightly rounded/triangular snout | Stingaree (F. Urolophidae) |
Created by:
mishm
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