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Sponges

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  1. Sponges Phylum: Porifera

  2. Sponge Characteristics • Simplest animal • Live in all oceans but prefer shallow tropical waters. • Sessile • Asymmetrical body plan • Filter feeders – can filter several thousand liters a day.

  3. Sponge Anatomy • Osculum – water out • Pores – water in • Collar cells (chanocytes) – filter food particles

  4. 2 Main types of “Skeletal” Tissue • 1. Spicule – a spike shaped structure made of calcium carbonate • 2. Spongin – a soft protein, tough elastic fibers.

  5. Sponge Reproduction

  6. Types of Sponges 1. Encrusting – Flat – found in turbulent waters 2. Tubular – Tall – found in calm waters 3. Boring – make holes in whatever they are attached to 4. Pecten – found on living shellfish