(chondro = cartilage, ichthyes = fish) Ichthyology = study of fish Skeleton – cartilage.

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Presentation transcript:

(chondro = cartilage, ichthyes = fish) Ichthyology = study of fish Skeleton – cartilage

Dorso-ventrally flattened body Dorso-ventrally flattened body Large, wing-like pectoral fins Large, wing-like pectoral fins Gill openings on ventral side of head Gill openings on ventral side of head Habitat – shallow water Habitat – shallow water

Sting rays

Manta Ray

Giant Manta Ray

Skate Rays

Placoid (dermal) scales, embedded in skin, feel like sand-paper Placoid (dermal) scales, embedded in skin, feel like sand-paper No gill covers No gill covers No swim bladder – No swim bladder – swim or sink Fusiform body – Fusiform body –streamlined great for swimming

Placoid Scales

Teeth - triangular, up to 3,000, in rows, ready to pop up Shark facts

Senses: Smell – Smell – very acute can smell one drop of blood from 1,000 feet away (1 part per 10 billion parts of water)

Vibration – Vibration – use lateral line Electrical fields – Electrical fields – use ampullae of Lorenzini on snout & around eyes Senses:

Senses: Sight – good, range = 70 – 100 feet, color vision Sight – good, range = 70 – 100 feet, color vision (as indicated by the presence of cone cells in their retinas)

Whale shark, largest fish in the ocean

Whale shark

Nurse Shark

Basking Shark

Great White Shark

Bull Shark

Hammerhead Sharks

Black-tipped Shark

Alarming situation